US3301893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorocarbon ethers containing sulfonyl groups
Assignee: EIDP Inc
•
Filing: 1963-08-05
•
Granted: 1967-01-31
•
Expires: 1983-08-05
Abstract
No abstract record available.
Inventors
- 👤 Putnam Robert Ervin
- 👤 Nicoll William Dickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:34
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/78; C07C309/79; C07C309/82; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/223; C08G65/226
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A FLUOROCARBON ETHER HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
7 words
A FLUOROCARBON ETHER HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US3114778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |