US2676985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoroalkyl amidines and salts thereof
Assignee: 3M Co
•
Filing: 1952-05-02
•
Granted: 1954-04-27
•
Expires: 1972-05-02
Abstract
No abstract record available.
Inventors
- 👤 Donald R Husted
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:55
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/16; C07C; C07C279/00; C07C279/04; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07; Y10S516/905; Y10S516/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
THE NEW AND USEFUL COMPOUNDS OF THE CLASS CONSISTING OF THE PERFLUOROALKYL AMIDINES HAVING THE FORMULA:
Claim 2
Dependent Claim
16 words
THE NEW AND USEFUL COMPOUNDS OF THE CLASS CONSISTING OF THE PERFLUOROALKYL AMIDINES HAVING THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |