Provisional patent application: what it actually gets you (and what it doesn’t)
For $325, the Patent Office will allow you to file a “provisional” patent application that gives you the right to claim “patent pending.” But the provisional patent application is one of the most misunderstood documents for new founders, who I often hear assume a provisional can do much more than it actually does.
A provisional is not a patent, and it will never be examined. It will expire 12 months after filing and after that, it cannot be revived. Nevertheless, its contents are critical; it sets the foundation for your non-provisional (i.e., full) patent application. Just as importantly, it can also serve as early prior art for your competitors, hindering their efforts to obtain their own IP.
But for a provisional to live up to its full potential, you need to know how to properly use it, and when to file one. This piece will cover what a provisional application gets you, what it doesn’t, some of the traps, and what a provisional worth filing looks like. I will also include a patent application drafting checklist. If you are just here for that template document, feel free to scroll to the end!
The difference between a provisional and non-provisional patent application
When most people hear the words “patent application,” they think about a technical document describing an invention, reviewed by a patent examiner, and, if deemed sufficiently inventive, ultimately granted as a patent. While obviously an over-simplification, this notion generally describes what a non-provisional patent application is and does. A provisional patent application is different.
A provisional, by contrast, serves as a low-cost placeholder to establish an early effective filing date for a later non-provisional application. It allows the inventors (or the company employing them) to further develop, test, and improve the invention before committing to the full expense of filing and prosecuting a non-provisional application. The provisional also sets an early filing date, which is important in the United States, where the first inventor to file a patent application has the right of priority, and a later filer could be out of luck, even if they invented first.
There are only a few things a provisional patent application needs. A cover sheet, a specification (including any necessary drawings), the names of the inventors, and a filing fee.[1] It does not require any patent claims, though including at least one is good practice, for the reasons discussed below.[2] A provisional application is never examined on the merits. The patent office will check certain formalities (e.g., missing fees or cover sheet), but no examiner reviews the disclosure to ensure it supports the claims. If the filer makes a mistake, they will not learn of it until much later.[3]
The contents of a provisional application, once filed, act essentially like a sealed and dated envelope. It cannot be amended to add anything new. It cannot be supplemented.[4] It will automatically expire in twelve months. But a non-provisional application filed before that expiration can use the provisional application’s filing date as its own, subject to several requirements.
What a provisional application gets you
First, a priority date. A non-provisional patent application can use the provisional’s filing date, but only for what the provisional teaches. If a claim is not adequately supported, that claim is not entitled to the provisional application filing date, and would need to rely on the non-provisional filing date.[5] A later effective filing date means more patents, publications, and other prior art would be available, including, in some cases, the filer’s own intervening prior art.
Second, the “patent pending” status, which can have signaling value with investors, competitors, partners, and prospective employees. Note, though, that you can only claim “patent pending” while an application is actually pending. If a provisional application expires without a follow-on non-provisional, it could be false marking to continue to claim “patent pending” status.[6]
Third, an added year at the end of your patent term. In the United States, a patent expires 20 years after its non-provisional filing date, subject to any patent term adjustment or extension. By filing a provisional application first (and thus delaying the non-provisional filing date one year), you effectively shift your patent’s expiration date one year later.[7] This may provide only a negligible benefit for a software invention, but it can represent enormous value at the end of life of a pharmaceutical or medical device asset.
Fourth, fee and cost deferral. The current government fees required to file a provisional application are $325 (or $130/$65 for small/micro entities). Compare this to the non-provisional application filing, search, and examination fees, which together total $2,000 for a large entity, $800 for a small entity, and $400 for a micro entity.[8] While the provisional application does not eliminate these latter fees, deferring them buys optionality on whether to proceed with a non-provisional application and its associated fees. Every non-provisional application not filed as a result of this kind of deferral buys approximately six provisional applications.
Fifth, confidentiality during an evaluation period. Provisional applications are never published on their own, and a provisional that is abandoned without its benefit ever being claimed stays confidential permanently. If a company decides to pivot away from an invention permanently, the company can simply abandon the associated provisional by doing nothing, without exposing the filing to competitors or creating prior art. But be aware, once you claim the benefit of a provisional application in an application that publishes, the patent office will make the underlying provisional available for inspection.[9]
For more on what belongs in a filing and what should stay inside the building, see “What Goes in the Patent, and What Stays in the Building.”
And what it does not
First, a provisional application does not buy examination or a place in the examination queue. It is simply a filing date placeholder. A non-provisional application will start at the bottom of the examination queue regardless of whether it claims priority to a provisional application. In other words, a provisional application does not speed up application consideration.
Second, a provisional application does not provide any enforceable rights. The filer cannot sue anyone. Even so-called “provisional rights” to royalties under § 154(d) run from the publication of a non-provisional application, not from a provisional application’s filing date.[10]
Third, the filer gets no protection for substance not in the provisional application disclosure. Anything added in the non-provisional application, and not described in the provisional, will not get the provisional application filing date. Describing a prototype in a provisional application does not necessarily mean that the final commercial product will be supported.
Fourth, there is no safety net at the 12-month abandonment date. A provisional application automatically expires after 12 months. While there are some mechanisms to restore priority after the 12 months, they are complicated and require sophisticated legal counsel.[11] The Patent Office will not send reminders about an upcoming 12-month deadline. Calendar the 12-month date as a final deadline, and do not miss it.
How to navigate the thin-provisional “trap”
Sometimes a company is forced to quickly file a provisional application, without sufficient time to fully flesh out a specification. This can happen, for example, when a company is trying to avoid damage that would be caused by an upcoming publication, or other potential prior art event. In these circumstances, companies can file what are colloquially known as “thin” or “cover sheet” provisional applications, where the entire application consists of a cover sheet over the document or information that is about to become public. This is done so that the provisional application predates any publication, removing the publication as potential prior art.
As one can imagine, these filings can be critical for avoiding complicated prior art headaches. But they can also create their own written description and priority headaches if the strategy surrounding thin filings is not properly navigated.
Companies should generally avoid thin applications unless they are necessary. If time permits, it is almost always better to file a fully supported disclosure with the help of an attorney. Recall that a claim in a non-provisional is not entitled to the provisional filing date if it is not adequately supported by the provisional. Thin applications often do not provide the kind of broad support needed to ensure a strong priority claim; often they are not technical documents, and even if they are, they are usually limited to a single or a small number of embodiments, without language designed to support patent claims.
Therefore, if a thin application must be filed, it should almost always be followed by a more fulsome provisional application, as soon as possible. The initial thin application prevents a forthcoming disclosure from becoming invalidating prior art, while the more fulsome follow-on application serves as the true anchor for most of the subject matter in the provisional application. A subsequent non-provisional application would thus claim priority to both the thin application and the more fulsome one.
Please also keep in mind that if a thin application is filed in a language other than English, an English-language translation and a statement that the translation is accurate must be filed in the provisional application before a benefit claim will be recognized. This rule applies to all provisional applications, but often is overlooked in the rush surrounding filing thin provisionals.[12]
What changed in August 2026
There is another danger in filing a thin provisional application, or any provisional that does not adequately support a later non-provisional application. A patent provides value by giving its owner the right to exclude others from making, using, offering for sale, selling, and importing its invention, but a patent application also can create prior art barriers for your competitors even if it never becomes an issued patent.
Until August 2026, a patent counted as prior art against a competitor as of the day you filed your underlying provisional, so long as the provisional described the critical prior art components or method steps relevant to your competitor.[13] But a recent decision in Dental Monitoring SAS v. Align Technology, Inc., No. 2025-1752 (Fed. Cir. Aug. 10, 2026) (Lourie, J.), established a higher standard. Now, the provisional application must provide support for at least one published claim of the non-provisional.[14]
Under this rule, a thin provisional application is especially vulnerable. Because the disclosure of a thin provisional is relatively limited, it often will not support the more robust initial claim set filed in a non-provisional application (the initial claim set is usually what gets published in a patent application publication). The thin provisional therefore limits your application’s ability to protect you from your competitors’ follow-on patent applications.
This also means that your competitors’ thin provisional applications may be vulnerable. A worrisome competitor application may not actually antedate you, and its provisional priority claim may be testable. Seek counsel or review before conceding a race.
What a provisional worth filing looks like
If the purpose of a provisional application is to provide support for a later non-provisional application, then the provisional should look like the non-provisional, minus the polish. It should not be a cover sheet. There are several things you can do to ensure you meet this test.
First, make sure to use a template non-provisional patent application and associated drafting checklist to ensure your application is as complete and accurate as possible. If you are unfamiliar with typical patent application formatting and content, read one to three patent applications far outside the scope of your company’s technical area (to avoid accidentally incorporating competitor ideas into your own application). If you need a template, please feel free to reach out!
In your application, make sure to include details describing how your invention works, not just what it does. Keep in mind that the engineering details can be an asset in the application. Things like ranges, materials, process windows, and failure modes can all support claims that cover your invention from different angles (as well as your competitors’ products).
Your provisional application should clearly include any current prototype — the single highest value item in a provisional application is usually a technical description of what a company is about to ship — but it should also include alternatives and ranges around your prototype’s preferred values, materials, and operating parameters.
In many cases, a final commercial embodiment diverges in at least some respects from a prototype described in an initial provisional application. And your competitors will often attempt to “design around” your patent application by varying these parameters in a way that ultimately would still permit them to market a competing product. Sufficiently describing alternatives and ranges allows you to erect barriers adjacent to your invention to keep competitors out while still covering your own commercial variants. As much of this as possible should be included in the provisional application.
Second, your provisional application should include claims, or at least claim-like statements. Recall that your application’s ability to block others as prior art depends on whether your application, when published, has a claim supported by your provisional application. One easy way to make sure it does is by including adequately supported claims in your provisional application, which are copied into your non-provisional application for initial publication.
Drafting claims also forces you to consider the boundary of your invention. This exercise exposes gaps and often raises questions about what coverage may be valuable.
A claim set also forces you to analyze and refine the underlying disclosure. Although claims are not required in a provisional,[15] the provisional disclosure should be drafted to fully support its own claims; meaning the claim set delineates what information should be included in the provisional application specification. In other words, the claim set exposes gaps in the disclosure while you still have time to fix them.
Third, keep in mind that a provisional patent application need not stand alone. A non-provisional application may claim the benefit of “one or more” prior filed provisional applications.[16] The correct pattern for a year of active product development may be filing a series of provisional applications, each time your invention materially changes.
Keep in mind, the earliest provisional application likely sets the 12-month deadline for filing a non-provisional application. An updated provisional application does not reset the 12-month deadline; however, in some cases, it may make sense to let an initial provisional application lapse while only claiming priority to one or more later-filed provisional applications. This strategy, however, should be closely analyzed with the assistance of sophisticated legal counsel.[17]
Additionally, each provisional in a series must include an inventor or joint inventor also named in the later application. Completely reshuffling inventorship between filings can break your chain.[18]
A patent drafting checklist
I would recommend contacting an attorney for help preparing and filing a provisional patent application. To help get your drafting started, I am providing a link to a drafting checklist and template below
Patent Application Drafting Checklist And Template -- Strain PLLC (PDF, 178KB)
If you made it this far, I owe you a beer.
Grab one with me in Washington, DC.
Author Note
Stephen G. Nagy is a patent attorney and engineer at Strain PLLC. This article is for general informational and educational purposes only, is not legal advice, and does not create an attorney-client relationship. It reflects the author’s views, not necessarily those of Strain PLLC. Legal authorities change; verify currency before relying on anything here. For advice on your specific situation, consult qualified counsel.
This article is my own work:
Notes
[1] 35 U.S.C. § 111(b)(1)–(2) (provisional requires a specification as prescribed by § 112(a) and a drawing as prescribed by § 113).
[2] U.S. Patent & Trademark Office, Provisional Applications for Patent Meet Paris Convention Requirements as Foreign Priority Documents (Nov. 16, 2003), https://www.uspto.gov/web/offices/com/sol/notices/provisional.html (confirming provisionals are sufficient as Paris Convention priority documents; no claim requirement imposed).
[3] MPEP § 601.01(b) (R-07.2015); 37 C.F.R. § 1.53(e), (g) (notice and surcharge for missing cover sheet or fee; Office may dispose of the application if the fee is not timely paid).
[4] MPEP § 601.01(b) (R-07.2015) (“Amendments, other than those required to make the provisional application comply with applicable regulations, are not permitted after the filing date of the provisional application.”).
[5] 35 U.S.C. § 119(e)(1); MPEP § 211.05(I)(A) (“If a claim in the nonprovisional application is not adequately supported by the written description and drawing(s) (if any) of the provisional application . . . that claim in the nonprovisional application is not entitled to the benefit of the filing date of the provisional application.”).
[6] 35 U.S.C. § 292.
[7] 35 U.S.C. § 154(a)(2)–(3) (term measured from the earliest U.S. non-provisional filing date; priority under § 119 “shall not be taken into account”). Patent term adjustment under § 154(b) and extension under § 156 may alter the date.
[8] USPTO Fee Schedule (eff. Jan. 19, 2025; last revised Aug. 14, 2026). Undiscounted components: $350 filing, $770 search, $880 examination.
[9] 37 C.F.R. § 1.14(a)(1)(vii) (an application never published or patented, whose benefit is not claimed and which is not identified in a published document, is not available to the public); compare id. § 1.14(a)(1)(iv)–(v) (file contents of a provisional available to any person once its benefit is claimed in an issued or published application).
[10] 35 U.S.C. § 154(d)(1) (royalty right runs from publication under § 122(b)); see also id. § 154(d)(2) (claims must be substantially identical).
[11] 35 U.S.C. § 111(b)(5) (provisional “shall not be subject to revival after such 12-month period”); 37 C.F.R. § 1.78(b) (restoration within two months, unintentional delay, petition fee under § 1.17(m)).
[12] 37 C.F.R. § 1.78(a)(5).
[13] MPEP § 2154.01(b) (R-01.2024); Penumbra, Inc. v. RapidPulse, Inc., IPR2021-01466 (P.T.A.B. Mar. 10, 2023) (precedential as to § II.E.3).
[14] Dental Monitoring SAS v. Align Tech., Inc., No. 2025-1752 (Fed. Cir. Aug. 10, 2026).
[15] 35 U.S.C. § 111(b)(2) (a claim “shall not be required in a provisional application”).
[16] 37 C.F.R. § 1.78(a) (applicant “may claim the benefit of one or more prior-filed provisional applications”).
[17] 37 C.F.R. § 1.78(a)(1)(i).
[18] 37 C.F.R. § 1.78(a)(2).
