Paste OR upload a patent portfolio (patentId, filingDate, grantDate, jurisdiction, entityStatus) and get, per patent: the 20-year term from filing and expiration date (35 U.S.C.
Paste OR upload a patent portfolio (patentId, filingDate, grantDate, jurisdiction, entityStatus) and get, per patent: the 20-year term from filing and expiration date (35 U.S.C. 154); the US maintenance-fee windows at 3.5 / 7.5 / 11.5 years from grant with the cited USPTO fee amount by entity status (37 CFR 1.20 / MPEP 2506); a portfolio cost projection summing upcoming fees over a horizon; and a clearly-labeled valuation HEURISTIC (discounted-remaining-life, NOT an appraisal). Date and term math is exact (EXACT verdict); the valuation is continuous and carries a numericTrust cross-check. HONEST: USPTO fees change (each amount is dated and links the live schedule to verify), foreign patents carry per-country annuities on a different schedule (flagged, out of scope), and the valuation is an estimate, not an appraisal. Batch CSV/JSON in, per-patent table + timeline chart out, CSV/JSON export. Deterministic, in-browser, no API/key/network/AI.
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