US3839425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoroalkyletheramidoalkyl betaines and sulfobetaines
Assignee: EIDP Inc
•
Filing: 1970-09-16
•
Granted: 1974-10-01
•
Expires: 1990-09-16
Abstract
Abstract 1. A COMPOSITION OF MATTER HAVING THE CHEMICAL FORMULA C3F7O(CF(CF3)CF2O)NCF(CF3)CON(R) R1N$(R2)(R3)-R4-X$ WHEREIN N IS AN INTEGER OF 0 TO 8, R IS HYDROGEN OR ALKYL OF 1 TO 6 CARBON ATOMS, R1 IS ALKYLENE OF 1 TO 12 CARBON ATOMS, R2 IS ALKYL OF 1 TO 6 CARBON ATOMS, R3 IS ALKYL OF 1 TO 6 CARBON ATOMS, R4 IS ALKYLENE OF 1 TO 4 CARBON ATOMS, AND X IS CO2 OR SO3.
Inventors
- 👤 P Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:43
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/13; C07C309/14; Y; Y10; Y10S; Y10S516/00; Y10S516/905; Y10S516/909; Y10S516/91; Y10S516/912; Y10S516/914; Y10S516/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A COMPOSITION OF MATTER HAVING THE CHEMICAL FORMULA
Claim 2
Dependent Claim
8 words
A COMPOSITION OF MATTER HAVING THE CHEMICAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |