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IP ReferencePatent Filing Resources
Key reference information for patent filing and prosecution in the United States and internationally. All information is general in nature and subject to change; consult current official sources before relying on any figures.
Filing a Utility Patent Application
A nonprovisional utility application requires a specification (written description and claims), drawings where necessary, an abstract, and the appropriate filing fees. Applications are examined in order of filing date unless Track One prioritized examination is requested.
Standard prosecution timeline: First office action typically issues 12–24 months from filing. Total pendency to allowance averages 24–36 months, though this varies significantly by technology center.
USPTO Apply for a Patent →Provisional Patent Applications
A provisional application establishes a U.S. filing date and gives the applicant 12 months to file a corresponding nonprovisional application claiming priority to it. Provisionals are not examined and do not automatically mature into patents.
Key deadline: The nonprovisional must be filed within 12 months of the provisional's filing date. This deadline cannot be extended.
USPTO Patent Center →U.S. Grace Period
The United States provides a 12-month grace period under 35 U.S.C. § 102(b)(1). An inventor's own disclosure (publication, sale, public use) made within 12 months before the effective filing date does not constitute prior art against the inventor's own application.
Caution: Most other countries do not recognize a grace period. Disclosing before filing typically forfeits foreign patent rights. File before disclosing whenever possible.
MPEP § 2153 →Patent Term & Maintenance Fees
Utility patents expire 20 years from the earliest effective filing date of the nonprovisional application. Design patents filed on or after May 13, 2015 expire 15 years from grant. Maintenance fees are due at 3.5, 7.5, and 11.5 years from issuance for utility patents.
USPTO Maintenance Fees →PTAB Appeals
An applicant may appeal a final rejection to the Patent Trial and Appeal Board (PTAB) by filing a Notice of Appeal followed by an Appeal Brief. The PTAB issues a written decision; further appeal lies to the U.S. Court of Appeals for the Federal Circuit or to the U.S. District Court for the Eastern District of Virginia.
USPTO PTAB →Track One: Prioritized Examination
Track One allows applicants to request prioritized examination for an additional fee, targeting a final disposition within 12 months of the prioritization date. The USPTO limits Track One grants to 10,000 per fiscal year.
Track One Details →What PCT Does
A PCT application (international application) does not itself result in a patent. It is a procedural mechanism that establishes a filing date in up to 157 contracting states simultaneously and defers the cost of national phase entry for up to 30 months from the priority date (31 months in some countries).
During the international phase, WIPO publishes the application and an International Search Report (ISR) and Written Opinion (WO) are issued by the International Searching Authority (ISA).
WIPO PCT Portal →Key PCT Deadlines
PCT filing deadline: 12 months from the earliest priority date (to preserve priority).
National phase entry: 30 months from the earliest priority date in most PCT contracting states (31 months in some, including EPO, Canada, Japan, Korea, China).
Chapter II demand: Must be filed within 22 months of the priority date to have a Written Opinion converted to an International Preliminary Report on Patentability (IPRP).
The table below summarizes grace period rules in major patent jurisdictions. A grace period allows an inventor’s own prior disclosure to be excused under certain conditions. Most jurisdictions have strict absolute novelty requirements with limited or no grace periods.
| Country / Region | Grace Period | Scope | Notes |
|---|---|---|---|
| United States | 12 months | Inventor’s own disclosures | 35 U.S.C. § 102(b)(1); covers publications, sales, public use by or originating from the inventor |
| Canada | 12 months | Inventor’s own disclosures | Patent Act s. 28.2(1)(a); disclosure by applicant or persons who obtained information from applicant |
| Japan | 12 months | Limited categories | Japan Patent Act Art. 30; must file exception claim at time of application; covers certain publications, exhibitions, and experiments |
| Korea | 12 months | Inventor’s own disclosures | Korean Patent Act Art. 30; must claim grace period at filing; expanded to 12 months in 2022 |
| China | 6 months | Very limited | Patent Law Art. 24; covers only: international exhibition, academic/technical conference, or government disclosure without applicant consent; strictly interpreted |
| EPO (Europe) | None (limited exception) | No general grace period | EPC Art. 55 provides a narrow 6-month exception only for abusive disclosure or display at certain official exhibitions; not a general grace period |
| United Kingdom | None (limited exception) | EPC-aligned post-Brexit | Same narrow Art. 55-equivalent exception; effectively no general grace period |
| Germany | None (limited exception) | EPC Art. 55 equivalent only | Strict novelty; any prior disclosure destroys novelty except for abusive disclosure |
| France | None (limited exception) | EPC Art. 55 equivalent only | Same as other EPC states |
| India | None | Absolute novelty required | Patents Act 1970; no grace period provision; strict novelty as of filing date |
| Australia | 12 months | Inventor’s own disclosures | Patents Act 1990 s. 24; must identify disclosure in patent application; covers information made publicly available by or with consent of applicant |
| Brazil | 12 months | Inventor’s own disclosures | Industrial Property Law Art. 12; covers disclosure by inventor, INPI, or authorized party |
Sources: USPTO, WIPO, EPO, and respective national patent office guidelines. Grace period rules are subject to change; verify current rules with local counsel before relying on any grace period.
European Patent Application
A European patent application (EPC) is examined centrally by the EPO. Upon grant, the patent must be validated in each EPC member state where protection is sought. Validation typically requires translation of the patent into the national language and payment of national validation fees.
Unitary Patent: Since June 2023, a granted European patent can be given unitary effect covering 17+ EU member states with a single request, eliminating the need for individual national validation in those states.
EPO Apply →EPO Key Facts
Filing languages: English, French, or German.
38 member states plus extension states and validation states.
No general grace period (narrow Art. 55 exception only).
Opposition period: 9 months from grant; any third party may oppose.
Patent term: 20 years from filing date, subject to national renewal fees after grant.
WIPO Services
WIPO administers the PCT international patent system, the Madrid System for international trademark registration, the Hague System for industrial designs, and numerous IP treaties. WIPO does not itself grant patents; national and regional offices retain that authority.
WIPO Portal →WIPO PATENTSCOPE
PATENTSCOPE provides free access to international patent applications filed through the PCT system and to the patent collections of many national and regional offices. Useful for prior art searching across multiple jurisdictions simultaneously.
WIPO PATENTSCOPE →Disclaimer: The information on this page is provided for general reference purposes only and does not constitute legal advice. Patent law, filing requirements, fees, and deadlines vary by jurisdiction and change over time. Always verify current requirements with the relevant patent office or with qualified legal counsel before making any filing decisions. Garg Law Firm, PLLC makes no representations as to the accuracy or completeness of this information and assumes no liability for reliance on it.