AIA Grace Period

The AIA grace period is a narrow exception to the prior art rules under 35 U.S.C. § 102(b)(1) that protects certain disclosures from becoming prior art against the inventor's own application: STATUTORY TEXT: § 102(b)(1): a disclosure made one year or less before the effective filing date of a claimed invention shall not be prior art to the claimed invention under subsection (a)(1) if — (A) the disclosure was made by the inventor or joint inventor or by others who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor; or (B) the subject matter disclosed had, before such disclosure, been publicly disclosed by the inventor or joint inventor or by another who obtained the subject matter disclosed directly or indirectly from the inventor; HOW IT WORKS: if an inventor publishes their invention on January 1, 2025, and files a patent application by January 1, 2026 (one year later), the January 1 publication is NOT prior art against their own application; the inventor has a full year after their own disclosure to file; CRITICAL LIMITATION: the grace period only protects: (1) the inventor's own disclosures; (2) disclosures by someone who derived the information from the inventor; THIRD-PARTY DISCLOSURES: if a THIRD PARTY (not the inventor and not derived from the inventor) publishes the same invention during the grace period (between the inventor's filing date minus one year and the filing date), that third-party publication IS prior art under § 102(a)(1); the AIA grace period does NOT protect against independent third-party disclosures during the grace period — this is a critical difference from pre-AIA law.

Pre-AIA and AIA grace periods are fundamentally different in scope and purpose: PRE-AIA GRACE PERIOD (35 U.S.C. § 102(b) pre-AIA): pre-AIA § 102(b) provided: a person shall be entitled to a patent unless the invention was patented or described in a printed publication in this or a foreign country or in public use or on sale in this country, more than one year prior to the date of application; KEY DIFFERENCE — pre-AIA bar: under pre-AIA, any disclosure (by ANYONE, not just the inventor) made more than one year before the application date was prior art; disclosures WITHIN one year of filing were NOT prior art regardless of WHO made the disclosure; this effectively gave ALL applicants a one-year grace period against all prior art; AIA CHANGES THE BASELINE: the AIA shifted from a first-to-invent system to a first-inventor-to-file system; the grace period was narrowed to protect only the inventor's own disclosures; third-party disclosures within the one-year window are now prior art unless derived from the inventor; PRACTICAL IMPACT: under pre-AIA, inventors could publish first and still file within one year even if a third party also published during that year; under the AIA, an independent third-party publication during the grace period could invalidate the inventor's claims; DERIVED DISCLOSURES PROTECTION: the AIA retained protection for disclosures by parties who obtained the information from the inventor (e.g., a collaborator who publishes before the inventor files); the derivation must be direct or indirect from the inventor; FOREIGN DISCLOSURE TREATMENT: pre-AIA had different rules for US and foreign disclosures; the AIA creates a unified worldwide system — all disclosures worldwide are evaluated the same way.

The meaning of 'disclosure' is critical to understanding when the grace period applies: WHAT COUNTS AS A DISCLOSURE for § 102(a)(1): patented, described in a printed publication, in public use, on sale, or otherwise available to the public; the AIA added 'otherwise available to the public' — a broader catch-all than pre-AIA; DISCLOSURES THAT START THE GRACE PERIOD CLOCK: any public disclosure by the inventor starts the one-year clock; examples: journal article, conference presentation, preprint, product launch, product demonstration, website publication, grant application (if publicly accessible), patent application publication; DISCLOSURE DATE PRECISION: the grace period is exactly one year — one day after the one-year anniversary of the inventor's own disclosure means the application is too late; CONFIDENTIAL DISCLOSURES: disclosures made under a non-disclosure agreement (NDA) or in confidence generally are NOT public disclosures and do not start the grace period clock or count as prior art; EXPERIMENTAL USE: experimental use of the invention does not constitute prior art if the use is experimental in nature to reduce the invention to practice (Pfaff v. Wells Electronics, S.Ct. 1998 framework still relevant to AIA); however, experimental use that reaches commercial production is generally a sale; ON-SALE BAR UNDER AIA: Helsinn Healthcare v. Teva Pharmaceuticals (S.Ct. 2019): a sale does not need to be public to trigger the § 102(a)(1) on-sale bar; a secret sale (with the patented technology kept confidential) can still trigger the bar; this is controversial because the AIA added 'otherwise available to the public' which some argued narrowed the on-sale bar.

The AIA grace period creates important strategic considerations for inventors and patent practitioners: FILE BEFORE PUBLISHING (PRIMARY RECOMMENDATION): the safest strategy is to file the patent application before any public disclosure; this protects against both: (a) third-party independent disclosures (which would be prior art if they occur before the filing date); (b) the risk of missing the one-year grace period window; PUBLISHING TO CREATE A GRACE PERIOD ANCHOR: some inventors intentionally publish (e.g., post a preprint) shortly before filing to: (a) establish a date from which the grace period starts; (b) prevent third parties from patenting the same invention in the interim; (c) support a derivation proceeding if needed; RISK OF INDEPENDENT THIRD-PARTY DISCLOSURE: the AIA grace period does NOT protect against independent third-party discoveries; if Inventor A publishes on January 1, and independent Inventor B publishes on March 1 (before A files), B's March 1 publication is prior art against A if A files after March 1; A's January 1 publication protects only against A's own prior art issue — not B's publication; UNIVERSITY AND RESEARCH INSTITUTION STRATEGY: academic institutions with slow technology transfer processes must be aware that long delays between invention and filing can result in third-party prior art; file first, publish later is the dominant strategy even in academia; DERIVATION PROCEEDINGS: under the AIA, if a third party files first after having derived the invention from the true inventor, the true inventor can file a derivation proceeding at the PTAB to establish inventorship priority; this is the AIA replacement for pre-AIA interference proceedings.

Section 102(b)(1)(B) provides an additional grace period protection for inventors who made a prior disclosure before a third party independently publishes: THE PROBLEM § 102(b)(1)(B) SOLVES: Inventor A publishes invention on January 1, 2025; Third Party B independently publishes the same invention on March 1, 2025; Inventor A files a patent application on June 1, 2025 (still within one year of A's own disclosure); WITHOUT PROTECTION: B's March 1 publication would be prior art under § 102(a)(1) (it was made before the June 1 filing date); WITH § 102(b)(1)(B): B's March 1 disclosure is NOT prior art against A because: (a) A had made an earlier disclosure of the subject matter on January 1; (b) B's disclosure came after A's January 1 disclosure; (c) A is filing within one year of A's own January 1 disclosure; the key is that A's own earlier disclosure 'disqualifies' subsequent third-party disclosures of the same subject matter; DERIVED vs. INDEPENDENT: § 102(b)(1)(B) protects against truly INDEPENDENT third-party disclosures that follow A's own disclosure; § 102(b)(1)(A) separately protects against disclosures by parties who derived the invention from the inventor; THE REMAINING RISK: § 102(b)(1)(B) does NOT protect against third-party disclosures that PRECEDE the inventor's own disclosure; if B publishes on December 31, 2024 (before A's January 1, 2025 disclosure), and A files on June 1, 2025, B's December 31 publication IS prior art under § 102(a)(1); this is why filing before publishing is preferable to publishing before filing.