PatentKin
Free, live statutory patent-deadline calculator: enter a filing date and matter type (provisional, PCT, granted utility/design/plant) and get real computed deadlines back - 12-month priority under 35 U.S.C. Section 119(e), PCT national-phase entry at 30/31 months under PCT Article 22/39, and US utility maintenance-fee windows at 3.5/7.5/11.5 years under 37 CFR 1.362. Save multiple matters in your