US2803656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorocarbonsulfonamidoalkanols and sulfates thereof
Assignee: 3M Co
•
Filing: 1956-01-23
•
Granted: 1957-08-20
•
Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Ahlbrecht
- 👤 Harvey A Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:54
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/004; C07; C07C; C07C311/00; C07C311/01; C07C311/02; C07C311/09; C07C303/00; C07C303/36; C07C303/38; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/905; Y10S516/909; Y10S516/91; Y10S516/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
THE NEW AND USEFUL FLUOROCARBON COMPOUNDS OF THE CLASS CONSISTING OF N-ALKANOL PERFLUOROALKANESULFONAMIDES HAVING THE FORMULA:
Claim 2
Dependent Claim
16 words
THE NEW AND USEFUL FLUOROCARBON COMPOUNDS OF THE CLASS CONSISTING OF N-ALKANOL PERFLUOROALKANESULFONAMIDES HAVING THE FORMULA:
References Cited (Backward Citations)
US2403207A
Cited
US2732398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |