US2831033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for etherifying polyfluoroalkanols
Assignee: Individual
•
Filing: 1954-01-06
•
Granted: 1958-04-15
•
Expires: 1974-01-06
Abstract
No abstract record available.
Inventors
- 👤 Jacques G O'rear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:16
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/12; C07C43/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A METHOD OF ETHERIFYING A POLYFLUOROALKANOL OF THE GENERAL FORMULA:
Claim 2
Independent Claim
10 words
A METHOD OF ETHERIFYING A POLYFLUOROALKANOL OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2433844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |