US 12,424,359 · Application 17/630,596 · Granted Sep 23, 2025
US 12,424,359
R-t-b series permanent magnet material, raw material composition preparation method and application
Estimated expiration
August 9, 2040
13y 309d remaining
- Could not fetch continuity data for application PCTCN2020100574: Resource not found (404)
Earliest effective filing
Jul 7, 2020
+ 20 years
Jul 7, 2040
PTA +33d
Aug 9, 2040
TD applied
Aug 9, 2040
Final
Aug 9, 2040
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. Terminal disclaimers can affect PTA (In re Cellect, LLC).
Calculation details
Base term
- Filing date
- January 27, 2022
- Earliest effective filing
- July 7, 2020
- Issue date
- September 23, 2025
- PTA
- +33 days
- Base expiry (before PTA)
- July 7, 2040
July 7, 2020 + 20 years = July 7, 2040 + 33 PTA days = August 9, 2040
- National stage entry of application PCTCN2020100574, filed Jul 7, 2020
Terminal disclaimers
TD caps expiration to August 9, 2040
US 12,198,840· Application 17/600,102Capping patent
Rare earth permanent magnet material and raw material composition,preparation method therefor and use thereof
- Filing date
- Sep 30, 2021
- Earliest effective filing
- Jul 22, 2020
- Issue date
- Jan 14, 2025
- PTA
- +326 days
- Calculated expiration
- Jun 13, 2041
National stage entry of PCTCN2020103430, filed Jul 22, 2020
Jul 22, 2020 + 20y + 326d PTA = Jun 13, 2041
US 12,424,359· Application 17/630,596(from application 17/630,596)Capping patent
R-t-b series permanent magnet material, raw material composition preparation method and application
- Filing date
- Jan 27, 2022
- Earliest effective filing
- Jul 7, 2020
- Issue date
- Sep 23, 2025
- PTA
- +33 days
- Calculated expiration
- Aug 9, 2040
National stage entry of PCTCN2020100574, filed Jul 7, 2020
Jul 7, 2020 + 20y + 33d PTA = Aug 9, 2040
US 12,609,224· Application 17/639,366(from application 17/639,366)
Neodymium-iron-boron magnet material, raw material composition,preparation method therefor and use thereof
- Filing date
- Mar 1, 2022
- Earliest effective filing
- Jul 7, 2020
- Issue date
- Apr 21, 2026
- PTA
- +929 days
- Calculated expiration
- Jan 22, 2043
National stage entry of PCTCN2020100588, filed Jul 7, 2020
Jul 7, 2020 + 20y + 929d PTA = Jan 22, 2043
US 12,531,174· Application 17/600,106(from application 17/600,106)
R-t-b-based permanent magnet material, preparation method therefor and use thereof
- Filing date
- Sep 30, 2021
- Earliest effective filing
- Jul 7, 2020
- Issue date
- Jan 20, 2026
- PTA
- +246 days
- Calculated expiration
- Mar 10, 2041
National stage entry of PCTCN2020100585, filed Jul 7, 2020
Jul 7, 2020 + 20y + 246d PTA = Mar 10, 2041
US 12,198,840· Application 17/600,102(from application 17/600,102)
Rare earth permanent magnet material and raw material composition,preparation method therefor and use thereof
- Filing date
- Sep 30, 2021
- Earliest effective filing
- Jul 22, 2020
- Issue date
- Jan 14, 2025
- PTA
- +326 days
- Calculated expiration
- Jun 13, 2041
National stage entry of PCTCN2020103430, filed Jul 22, 2020
Jul 22, 2020 + 20y + 326d PTA = Jun 13, 2041
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 17/630,596 · US 12,424,359
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www.patentreply.ai/tools/patent-expiration/US12424359Data 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.