US3684796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of bis-perfluoroalkanoyl-phenylene-diamines
Assignee: Hoechst AG
•
Filing: 1970-02-24
•
Granted: 1972-08-15
•
Expires: 1990-02-24
Abstract
Abstract Compounds of the general formula WHEREIN RF and R''F, which are identical or different, represent a perfluorinated alkyl radical having four to 12 carbon atoms, and R1 represents one of the groups AND THEIR USE FOR OIL-, WATER- AND SOIL- REPELLENT FINISHES.
Inventors
- 👤 Otto Scherer
- 👤 Klaus-Dieter Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:34
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/12; C07C51/00; C07C51/58; C07C51/60; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/16; C07D203/18; C07D203/20; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/408
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
1 words
3,4-di-perfluoro-octanoyl-amino-1-N,N-ethylene-ureido-benzene.
References Cited (Backward Citations)
US3250674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |