Free tools · PCT national phase deadline
When is the PCT national phase deadline?
The national phase of an international (PCT) application must be entered 30 months from the earliest priority date at most offices, including the USPTO; the European Patent Office and a number of others allow 31 months. Enter the earliest priority date below for both dates.
By patent number
One number, any format. Pick what you want to know about it, or ask for everything.
Free. Five lookups a day per visitor; fifteen with an email. The examiner's search log is read by a paid transcription, so it is limited to three new patents a day per visitor and twenty for everyone. A patent already read is always free and never counts. Resets at midnight UTC.
Every answer shown here, by email, with a link back. Also lifts your limit to fifteen lookups a day.
Deadline calculators
Dates in, dates out. The IPR one-year bar, the PTAB milestones, a contest's close in your own zone, the PCT national phase and the EP opposition window.
Date the complaint was served (35 U.S.C. §315(b)).
Date the IPR petition was filed.
The close as posted, Eastern Time.
Earliest priority date. 30 months for most offices; 31 for the EP and some others.
Date the mention of the EP grant was published. An opposition is due 9 months later (Art. 99 EPC).
Statutory and rule-based intervals, counted in calendar days; the PTAB lines are the usual milestones, and the Board's own scheduling order governs. Not legal advice. Feeds the invalidity search.
WO / PCT report reader
A WO number in; out: the international search report's citations with their X, Y and A categories and the claims each was aimed at, the earliest priority, the national-phase dates, and whether the US national phase has been entered.
International search report · EPO record
- X
- Y
- A
X: relevant alone. Y: relevant combined with another. A: background. Only the searching authority's own citations are listed, not the applicant's. National-phase limits vary by office; check the WIPO PCT time-limits table for the one you need.
Wayback date-prover
A URL in; out: the earliest archived capture of the page and its link, as a citable line for dating a manual, a datasheet or a product page. A capture proves the page existed by that date; it says nothing about when it was first published. Feeds the non-patent literature sweep.
From the Wayback Machine
About this tool
Missing the date usually ends the application in that country, although many offices offer reinstatement or late entry for a fee and a showing of due care or unintentional delay.
Time limits vary office by office, so check WIPO's PCT national phase time-limits table before relying on 30 or 31 for a particular country.
Questions
- Is the PCT deadline counted from the international filing date?
- No, from the earliest priority date claimed. If no priority is claimed, the international filing date is the priority date.
- Can the US national phase deadline be extended?
- Not as such. A US national stage entered after 30 months may be accepted on a petition to revive for unintentional delay, with a fee.