US 12,647,259 · Application 18/146,085 · Granted Jun 2, 2026
US 12,647,259
Room-temperature coherent spin-photon interface and programmable spin arrays for scalable quantum repeaters
Estimated expiration
October 4, 2044
18y 21d remaining
Earliest effective filing
Dec 23, 2022
+ 20 years
Dec 23, 2042
PTA +651d
Oct 4, 2044
No TD
—
Final
Oct 4, 2044
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
- December 23, 2022
- Earliest effective filing
- December 23, 2022
- Issue date
- June 2, 2026
- PTA
- +651 days
- Base expiry (before PTA)
- December 23, 2042
December 23, 2022 + 20 years = December 23, 2042 + 651 PTA days = October 4, 2044
- PRO63/323,763 — Provisional — not used for base term
- PRO63/293,479 — Provisional — not used for base term
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
The prosecution record for your AI
Application 18/146,085 · US 12,647,259
You have the date. Your AI can have the file.
PatentReply compiles the prosecution history behind US 12,647,259: the claims as filed and as allowed, every Office Action and response, and the cited references, with each answer pointing back to the filed passage.
One public application a month is free. The first compile takes a few minutes.
Strategy and filing changes require your approval.
Permanent link
www.patentreply.ai/tools/patent-expiration/US12647259Data 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.