US3471484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluorinated beta amino propionic acid fluorides
Assignee: 3M Co
•
Filing: 1965-05-03
•
Granted: 1969-10-07
•
Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 Richard A Guenthner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:22
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/27; C25B3/28; C25B3/01; C25B3/05; C25B3/07; C25B3/09; C25B3/11; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2500388A
Cited
US2519983A
Cited
US2567011A
Cited
US2616927A
Cited
GB763673A
Cited
US2950317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |