US 12,647,189 · Application 18/187,838 · Granted Jun 2, 2026
US 12,647,189
Method and system for authenticating an optical fiber key
Estimated expiration
August 25, 2043
16y 325d remaining
Earliest effective filing
Mar 22, 2023
+ 20 years
Mar 22, 2043
PTA +156d
Aug 25, 2043
No TD
—
Final
Aug 25, 2043
This calculation includes patent term adjustment (PTA) under 35 U.S.C. §154(b). Patent term extension (PTE) under 35 U.S.C. §156 (for FDA-regulated products) is not included.
Calculation details
Base term
- Filing date
- March 22, 2023
- Earliest effective filing
- March 22, 2023
- Issue date
- June 2, 2026
- PTA
- +156 days
- Base expiry (before PTA)
- March 22, 2043
March 22, 2023 + 20 years = March 22, 2043 + 156 PTA days = August 25, 2043
Continuity chain
No continuity chain; the patent’s own filing date was used.
Terminal disclaimers
Patent term extension under 35 U.S.C. §156, which can apply to certain drug, biologic, animal drug and medical device patents, is not included in this calculation. How PTE is calculated
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Application 18/187,838 · US 12,647,189
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www.patentreply.ai/tools/patent-expiration/US12647189Data sourced from public USPTO records. This tool provides informational estimates and should not be relied upon as legal advice. Always verify patent expiration dates independently, especially where patent term extension, terminal disclaimers, or unusual continuity issues may apply.