Provisional Application

A provisional patent application is a simplified filing under 35 U.S.C. § 111(b) that establishes a priority date for an invention: CONTENTS — REQUIRED: (1) a written description of the invention sufficient to enable a person skilled in the art to make and use the invention (the § 112(a) written description and enablement standard applies); (2) drawings if necessary to understand the invention; CONTENTS — NOT REQUIRED: formal patent claims (unlike non-provisional applications, provisionals do not require claims); oath or declaration; prior art information statement; WHAT IT IS NOT: a provisional is NOT examined by the USPTO; it does NOT become a patent; it does NOT publish automatically; it does NOT grant any patent rights; it simply establishes a date in the USPTO's records; TERM: 12 months from the provisional filing date; after 12 months, the provisional automatically expires and CANNOT be revived or extended; the 12-month period is a statutory bar — there are no extensions; FILING FEE: significantly lower than non-provisional — $320 for large entities (2024), $160 for small entities, $80 for micro-entities; AFTER FILING: the inventor receives a filing date and a serial number; the application is stamped 'patent pending'; the inventor has 12 months to file a non-provisional (or PCT application claiming the provisional's priority); CONVERSION: a provisional can be converted to a non-provisional by petition before the 12-month expiration (this restarts the 20-year patent term clock from the converted application's filing date — generally disadvantageous).

The provisional's primary purpose is to establish an early effective filing date: EFFECTIVE FILING DATE: the claims in a non-provisional application that is properly entitled to the provisional's benefit have an effective filing date equal to the provisional's filing date for subject matter disclosed in the provisional; PRIOR ART CUTOFF: with an earlier priority date, prior art published after the provisional filing date does NOT count against the non-provisional's claims (for subject matter supported by the provisional); RACE TO FILE: in the AIA first-inventor-to-file system, filing a provisional before a competitor files anything secures priority even if the competitor files a non-provisional first; AIA GRACE PERIOD INTERACTION: the provisional filing date starts the effective filing date clock; the AIA's § 102(b)(1) grace period protects the inventor's own disclosures made within 1 year before the EFFECTIVE FILING DATE (= provisional date if properly supported); PATENT TERM: a provisional does NOT start the 20-year patent term clock; the term begins from the non-provisional application's filing date; an inventor can benefit from up to 12 extra months of patent protection compared to filing a non-provisional first; EXAMPLE: Provisional filed January 1, 2024; Non-provisional filed December 31, 2024 (within 12 months); Non-provisional patent issues and expires December 31, 2044 (20 years from non-provisional date); BUT priority date for § 102 prior art analysis = January 1, 2024; the 12 months of prosecution before filing the non-provisional are effectively 'free' in terms of patent term.

Provisionals are frequently misused and can provide false security if not carefully prepared: UNDERDISCLOSURE — THE CRITICAL RISK: a provisional only provides priority for subject matter that is DISCLOSED in the provisional; if a claim in the non-provisional application is not supported by the provisional's disclosure, that claim does NOT get the benefit of the provisional's priority date; this can make the non-provisional claim vulnerable to prior art from between the provisional and non-provisional filing dates; WRITTEN DESCRIPTION REQUIREMENT: 35 U.S.C. § 112(a) requires that the specification describe the invention to satisfy the written description and enablement requirements; a 'quick provisional' that only describes one embodiment may not support broader claims filed 12 months later; New Railhead Manufacturing v. Vermeer Manufacturing (Fed. Cir. 2002): provisional did not adequately describe a key limitation → non-provisional claim did not receive provisional priority → pre-provisional on-sale bar applied; INADEQUATE PROVISIONAL = NO PRIORITY BENEFIT: if the provisional is merely a rough disclosure that doesn't satisfy § 112(a) for the claimed features, the non-provisional claims are treated as if no provisional was filed; MISSING THE 12-MONTH DEADLINE: the 12-month deadline is absolute with no grace period; if the non-provisional is not filed by the 12th month anniversary, the provisional expires and cannot be claimed as priority; note: a PCT application can be filed instead of a US non-provisional within 12 months; PUBLICATION RISK: if the inventor publicly disclosed the invention before filing the provisional, the AIA grace period clock may be running; even with a provisional on file, if the grace period expires before filing the non-provisional, prior art from after the disclosure could apply to undisclosed claim features.

The level of detail required in a provisional is one of the most commonly misunderstood issues: MINIMUM LEGAL STANDARD: the provisional must satisfy § 112(a) written description and enablement for the subject matter being claimed in the eventual non-provisional; the question is: for each feature claimed in the non-provisional, does the provisional specification adequately describe and enable that feature?; A 'QUICK AND DIRTY' PROVISIONAL FAILS: some practitioners file a minimal disclosure (a draft, an abstract, a conference paper) as a provisional; this is risky if the eventual non-provisional claims features not fully described in the minimal provisional; WHEN A MINIMAL PROVISIONAL IS ACCEPTABLE: if the inventor plans to claim only what is described in the minimal filing; if the technology is simple and fully captured in the draft; if there is no anticipated need to claim broader variations; RECOMMENDED APPROACH — AS DETAILED AS POSSIBLE: the ideal provisional includes: (1) a full description of the invention with all contemplated embodiments; (2) drawings showing all important features; (3) detailed description of all examples; (4) discussion of how the invention differs from prior art; (5) claims (optional but recommended) — which defines what the applicant considers the invention to be; including draft claims helps ensure the written description supports future non-provisional claims; TRADE-OFF: a more detailed provisional costs more to prepare but provides more robust priority protection; a minimal provisional is cheaper but may not protect broader claims; PROSECUTION STRATEGY: patent prosecutors typically prepare the provisional with the same level of care as a non-provisional for important inventions.

Provisionals have unique rules about abandonment, publication, and confidentiality: AUTOMATIC ABANDONMENT: a provisional automatically becomes abandoned 12 months after its filing date; there is no office action, no examination, and no notice — it simply expires; the inventor does not need to take any action to abandon a provisional; PUBLICATION: provisionals are NOT automatically published by the USPTO; they remain confidential unless: (a) the applicant files a non-provisional claiming priority to the provisional, and that non-provisional publishes at 18 months from the provisional date (which is effective the 18-month clock); (b) the applicant specifically requests publication; (c) foreign applications claiming priority to the provisional publish in foreign offices; CONFIDENTIALITY BENEFIT: a provisional can be used to establish a priority date while keeping the invention confidential for up to 30 months (12 months to file non-provisional + 18 months until publication); this gives inventors time to evaluate commercial viability before public disclosure; CONVERTING vs. FILING NEW: converting a provisional to a non-provisional (via petition) costs the same as a new non-provisional filing fee; the conversion starts the 20-year patent term from the conversion date (= provisional date + time of conversion); this is almost always less advantageous than filing a separate non-provisional claiming provisional priority; MULTIPLE PROVISIONALS: an inventor can file multiple provisionals for related improvements; a non-provisional can claim priority to multiple provisionals filed within the last 12 months, combining their disclosures into one non-provisional.