Patent Grace Period

The US AIA (America Invents Act) provides a 12-month grace period for certain pre-filing disclosures: STATUTORY BASIS: 35 U.S.C. § 102(b)(1) (AIA): a disclosure that would otherwise be prior art under § 102(a)(1) (public disclosures) or § 102(a)(2) (patent application publications) is NOT prior art against the applicant if: the disclosure was made 1 year or less before the effective filing date of the claimed invention; AND the disclosure was made by the inventor or joint inventor; OR by another who obtained the subject matter directly or indirectly from the inventor; PRE-AIA GRACE PERIOD: for applications filed before March 16, 2013, the pre-AIA § 102(b) applied: a person is not entitled to a patent if the invention was described in printed publications, was in public use, or was on sale more than 1 year before the application was filed; the pre-AIA grace period was broader in some ways (covered third-party disclosures if the inventor filed within 1 year); HOW THE AIA GRACE PERIOD WORKS: EXAMPLE: inventor files provisional application on June 1, 2024; inventor presents the invention at a conference on July 1, 2024; inventor files non-provisional application on December 1, 2024; the conference presentation (July 1) is within 12 months of the non-provisional filing (December 1) AND it was the inventor's own disclosure; the presentation is NOT prior art against the non-provisional application (the grace period applies); CRITICAL LIMITATION: the AIA grace period protects ONLY the INVENTOR's own disclosures; if a THIRD PARTY discloses the invention AFTER the inventor's disclosure, the third party's disclosure is NOT prior art (because the inventor disclosed first); BUT: if a third party discloses the invention INDEPENDENTLY AND BEFORE the inventor files, the third party's disclosure IS prior art — and the grace period does NOT protect against it.

Absolute novelty means any prior disclosure defeats a patent application — there is no grace period: DEFINITION: under an absolute novelty system, a patent can only be granted for an invention that was not publicly known, used, or disclosed anywhere in the world before the filing date (or priority date); any public disclosure before the filing date = the invention lacks novelty = the patent application will be rejected; COUNTRIES WITH ABSOLUTE NOVELTY (NO GRACE PERIOD): EUROPE: EPC Article 54 — the state of the art comprises everything available to the public before the filing date; no grace period for the inventor's own disclosures; CHINA: Article 22 of the Chinese Patent Law — absolute novelty requirement; no grace period for most disclosures; LIMITED EXCEPTION: China provides a 6-month grace period for disclosures at international exhibitions recognized by the Chinese government or disclosures at specified academic/technical conferences; JAPAN: Article 29 of the Japanese Patent Act — absolute novelty; LIMITED EXCEPTION: Japan provides a 12-month grace period for the inventor's own disclosures at academic societies or for government exhibitions; KOREA: absolute novelty with a 12-month grace period for inventor's own disclosures at scientific or academic societies; MOST COUNTRIES: Australia, Canada, and many others: limited grace periods or absolute novelty depending on disclosure type; PRACTICAL IMPLICATION: an inventor who presents at a US conference on Day 1 has destroyed novelty for ALL countries that require absolute novelty, even if they file a US provisional on Day 2; the US provisional on Day 2 establishes a priority date — but that priority date is AFTER the conference disclosure; the conference disclosure is prior art in EPO/China/Japan even if the US application is protected by the grace period.

The solution to the absolute novelty problem requires advance planning: THE CORE STRATEGY: FILE BEFORE ANY PUBLIC DISCLOSURE; this is the only foolproof solution for international patent protection; WHEN A DISCLOSURE IS UNAVOIDABLE: file a provisional application BEFORE the disclosure; the provisional establishes a priority date BEFORE the disclosure; all subsequent applications claiming that provisional's priority date will have a pre-disclosure priority date; the disclosure cannot destroy novelty if the priority date pre-dates the disclosure; PRACTICAL WORKFLOW: Day 0: complete the invention; Day 1: file provisional patent application ($80-$160 micro entity + attorney time); Day 2+: present at conference; pitch to investors (without NDA if needed); launch crowdfunding; publish academic paper; Day 0-365: file non-provisional patent application (can be filed up to 12 months after provisional); option: file PCT application within 12 months of provisional → national phase in EP/CN/JP by 30 months; PARIS CONVENTION PRIORITY: all major patent countries (including EP, CN, JP) are members of the Paris Convention; Article 4: filing in one member country establishes a priority date for filing in other member countries within 12 months; a US provisional establishes the priority date for all subsequent Paris Convention applications; KEY RULE: the priority date must pre-date any public disclosure for absolute novelty countries; WHAT THE GRACE PERIOD CANNOT DO: the US grace period protects only US rights; it does not retroactively fix disclosures that occurred before the provisional was filed; it does not protect EP/CN/JP rights where absolute novelty applies; it cannot repair the situation where an inventor discloses first, then files; for international rights, the ONLY solution is to file before disclosure.

Understanding what constitutes a public disclosure is essential for managing patent rights: TYPES OF PUBLIC DISCLOSURES: PRINTED PUBLICATIONS: academic journal articles; conference papers; published abstracts; thesis; technical reports posted online; blog posts; social media posts describing the invention in technical detail; PATENTS AND PATENT APPLICATIONS: published US patent applications (18 months after filing); issued US patents; foreign published patent applications; PCT applications; PUBLIC USE: a product or method used publicly, even if the technical details are not visible; public demonstration at a trade show; a product for sale where users can observe the invention's operation; ON SALE BAR (§ 102(a)(1) + Pfaff v. Wells Electronics, S.Ct. 1998): a patent cannot be obtained if the claimed invention was 'on sale' more than 1 year before the filing date; the 'ready for patenting' test: the invention is on sale if it is the subject of a commercial offer for sale AND is ready for patenting (reduced to practice OR embodied in drawings/descriptions sufficient for an enabling disclosure); Helsinn Healthcare v. Teva Pharmaceuticals (S.Ct. 2019): a confidential sale (subject to an NDA) triggers the on-sale bar under AIA if the terms of the agreement are publicly disclosed; WHAT DOES NOT COUNT AS PUBLIC DISCLOSURE: internal communications (emails; lab notebooks; internal presentations) if kept confidential; disclosures under a BINDING NDA (though see the Helsinn caveat about public disclosure of the existence of the sale); FOREIGN DISCLOSURES: public disclosures anywhere in the world count as prior art (AIA was clear that geographical limitations were removed); a Chinese academic paper published before the US filing date is prior art; ORAL DISCLOSURES: an oral presentation at a conference is generally a public disclosure if the audience is unrestricted; a pitch to investors under NDA is NOT a public disclosure (NDA is a confidentiality obligation).

Grace period rules vary significantly across major patent jurisdictions: US AIA GRACE PERIOD (§ 102(b)(1)): 12 months; covers only inventor's own disclosures; covers disclosures by those who obtained the subject matter from the inventor; does NOT cover independent third-party disclosures that predate the inventor's disclosure; first-inventor-to-file system — filing date is critical; EUROPE (EPC): NO general grace period; EXCEPTION under EPC Rule 55(b): disclosure at an internationally recognized exhibition — very narrow; disclosures that only arise from an evident abuse in relation to the applicant — also very narrow; PRACTICAL RESULT: a disclosure at a US conference (even by the inventor) before the filing date destroys novelty for a European patent application; CHINA: 12-month grace period in limited cases: (a) first disclosure at an international exhibition recognized by the Chinese government; (b) first disclosure at a prescribed academic or technology conference; NOT a general grace period for all inventor disclosures; the Chinese 12-month grace period is much narrower than the US grace period; JAPAN: 12-month grace period (Article 30): covers disclosures by the inventor or persons who obtained the invention from the inventor; must file an application claiming the grace period within 12 months; the grace period request must be filed along with (or within 30 days of) the patent application; procedural requirements are strict; SOUTH KOREA: 12-month grace period for inventor's own disclosures at academic societies or prescribed conferences; CANADA: 12-month grace period (Patent Act, Section 28.2(1)(a)); US-like grace period for inventor's own disclosures; one of the few countries outside the US with a generous grace period; AUSTRALIA: 12-month grace period (under Raising the Bar Act); covers inventor's own disclosures; PRACTICAL STRATEGY: to fully exploit the US grace period WITHOUT losing international rights: file a provisional application before any public disclosure; if a disclosure occurs accidentally before a provisional is filed: the US rights may be preserved by the grace period; the international rights (EP, CN, most of the world) are lost; LESSON: the US grace period is a safety net for US-only patents, NOT a license to disclose freely if international protection is important.