Grace Period

The US patent grace period under the America Invents Act (AIA) provides inventors a limited window after disclosure to file a patent application: STATUTORY BASIS: 35 U.S.C. § 102(b)(1) (AIA): disclosures made one year or less before the effective filing date (EFD) of a claimed invention shall not be prior art against the inventor's own application IF: (a) the disclosure was made by the inventor or joint inventor (or by a party who obtained the subject matter from the inventor); (b) OR the disclosure was made by a third party AFTER the inventor had disclosed the subject matter; WHAT THE GRACE PERIOD PROTECTS: INVENTOR'S OWN DISCLOSURES: an inventor who publishes a paper, presents at a conference, or posts online about the invention has 1 year to file a US patent application; the publication does not count as prior art against the inventor for US purposes; THIRD-PARTY DISCLOSURE AFTER INVENTOR DISCLOSED: if the inventor publishes first (in the grace period), a third party who reads the publication and publishes their own disclosure cannot invalidate the inventor's later-filed application; WHAT IT DOES NOT PROTECT: THIRD-PARTY DISCLOSURES BEFORE INVENTOR'S OWN DISCLOSURE: if a third party independently discloses the same invention before the inventor has disclosed it, that third-party disclosure IS prior art; the inventor must file before that third-party disclosure date (or earlier); COMMERCIAL ACTIVITIES AS DISCLOSURE: public use, on-sale activity, or other disclosure by the inventor in the grace period is also protected (though the on-sale bar is complex); PRE-AIA GRACE PERIOD: under pre-AIA § 102(b), the grace period protected the inventor from his or her own disclosures + public use + sales; applied to activities anywhere in the world; AIA grace period is narrower in some respects and applied only to AIA-governed applications (effective filing date on or after March 16, 2013).

The US grace period is a significant exception to global patent law norms: MOST COUNTRIES: NO GRACE PERIOD — any public disclosure before the filing date destroys novelty; this is the ABSOLUTE NOVELTY requirement; under European Patent Convention (EPC): exceptions only for: (1) obvious abuse or unauthorized disclosure; (2) display at an officially recognized international exhibition (very narrow); EUROPEAN PATENT OFFICE: a pre-filing disclosure by the inventor destroys novelty for a European patent; no grace period for voluntary disclosures; the narrow EPC exception (Article 55) applies only to unauthorized disclosure or international exhibitions; JAPAN: narrow grace period of 6 months for disclosures by the applicant; covers publications, presentations at academic meetings, exhibitions; requires a separate application to invoke; CHINA: also has a narrow 6-month grace period for specific circumstances (international exhibitions, academic/technical conferences, disclosure without consent); requires specific documentation; CANADA: 12-month grace period (similar to US) for the applicant's own disclosures; AUSTRALIA: 12-month grace period for disclosures by or with permission of the applicant; PRACTICAL CONSEQUENCE: US-ONLY STRATEGY: an inventor who discloses the invention (e.g., publishes a paper) and then files a US application within 1 year protects US rights; BUT: that publication destroys all patent rights in Europe, most of Asia (except Japan/China narrow exceptions), and most of the world; GLOBAL PROTECTION STRATEGY: file a PCT application or national applications BEFORE any public disclosure; if disclosure already occurred: file immediately and assess which countries still allow filing (US, Canada, Australia, Japan, China with specific procedures); ACADEMIC ENVIRONMENT: the US grace period enables academic publishing before patenting; but international patent rights are largely sacrificed unless a provisional is filed before publication.

Understanding what triggers the grace period clock is critical for timing patent applications: PUBLICATIONS: journal articles; conference papers; preprints (arXiv, SSRN, bioRxiv); published abstracts; blog posts; news articles describing the invention in enabling detail; ORAL DISCLOSURES: presentations at conferences if the content is enabling and publicly accessible; recorded presentations posted online; podcast or video disclosures with sufficient technical detail; COMMERCIAL ACTIVITIES: public use of the invention: demonstrating the invention publicly (not in confidential testing); on-sale bar: offering the invention for sale publicly (Helsinn Healthcare v. Teva Pharmaceuticals, S.Ct. 2019: even confidential sales that are publicly disclosed can trigger the bar; whether AIA changed this is debated but Helsinn confirmed the bar applies to AIA as well); INTERNET DISCLOSURES: social media posts describing the invention; GitHub repositories (if publicly accessible and enabling); website publications; WHAT DOES NOT TRIGGER: confidential disclosures: sharing with a co-inventor under NDA; sharing with investors under NDA; internal company communications; disclosures to persons under implied confidentiality (e.g., close collaborators during development); DETERMINING THE DATE: the grace period clock starts on the date of first public access to the disclosure; for a journal publication: online publication date, not print date; for a conference: date of the presentation; CRITICAL: if any public disclosure exists, the inventor must file within 1 year to preserve US rights; the specific date of the disclosure controls — not an approximation.

Provisional patent applications are a key tool for managing disclosure timing and the grace period: PROVISIONAL APPLICATIONS: a provisional patent application (35 U.S.C. § 111(b)) establishes an effective filing date; it is not examined and never becomes a patent on its own; it provides a 12-month window to file a non-provisional (or PCT) claiming priority to the provisional; PROVISIONAL + GRACE PERIOD STRATEGY: BEFORE DISCLOSURE: file a provisional application describing the invention; disclose publicly; file non-provisional or PCT within 12 months of provisional filing date; the provisional establishes an earlier priority date; any third-party disclosures after the provisional filing date are not prior art; AFTER DISCLOSURE (GRACE PERIOD USE): inventor has already disclosed; wants to file US patent application; file non-provisional within 1 year of disclosure; the non-provisional claims the earlier provisional's priority date only for subject matter in the provisional; subject matter not in the provisional but added to the non-provisional has a later priority date; IMPORTANCE OF PROVISIONAL COMPLETENESS: the provisional must provide adequate written description for the claimed subject matter; a poorly written provisional does not support claims for the added subject matter; AIA GRACE PERIOD INTERACTION: the inventor's own disclosure starts the 1-year clock; filing a provisional within 1 year establishes priority date; claims in the eventual patent need priority going back to before the disclosure to avoid the disclosure being prior art for other claims; COMMON MISTAKE: inventor discloses, files a thin provisional, then adds substantial new material in the non-provisional; the new material has the non-provisional's filing date, not the provisional's; if more than 1 year passed from disclosure to non-provisional filing, the disclosure may be prior art for the new material.

Patent applicants frequently misunderstand or mismanage the grace period, leading to loss of rights: MISTAKE 1: RELYING ON GRACE PERIOD FOR FOREIGN RIGHTS: inventors file a US application within the grace period and assume their rights are protected globally; REALITY: the public disclosure has already destroyed European, Chinese, Japanese (except narrow exceptions), and most other foreign patent rights; CORRECTION: file before any public disclosure (provisional + PCT strategy); MISTAKE 2: UNDERESTIMATING WHAT COUNTS AS DISCLOSURE: inventors assume only formal publications trigger the clock; REALITY: a public conference presentation, a posted slide deck, a GitHub commit, or a detailed blog post can all trigger the grace period; CORRECTION: consult patent counsel before any public presentation or publication; MISTAKE 3: MISSING THE 1-YEAR DEADLINE: inventor publishes, then forgets to file within 1 year; REALITY: after 1 year from disclosure, US patentability is also lost; CORRECTION: calendar the deadline immediately upon any public disclosure; MISTAKE 4: THIRD-PARTY SAME-INVENTION DISCLOSURE BEFORE THE INVENTOR'S FILING: inventor has a grace period for their own prior disclosures, but NOT for third-party disclosures of the same invention before the inventor's own disclosure; REALITY: if someone else discloses the same invention first (and the inventor has not disclosed yet), the inventor must file before that third-party date — the grace period does not help; MISTAKE 5: ASSUMING ON-SALE BAR IS CLEARLY DEFINED: Helsinn (2019) confirmed that even a confidential sale that is publicly disclosed may trigger the on-sale bar under AIA; CORRECTION: avoid commercial activities related to the invention before filing; MISTAKE 6: UNDERFUNDED PROVISIONAL: filing a minimal provisional just to get a date, without providing sufficient written description; CORRECTION: the provisional must enable all claims intended to be filed in the non-provisional.