US2824139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorochloro ketones and methods for the preparation thereof
Assignee: 3M Co
•
Filing: 1955-06-24
•
Granted: 1958-02-18
•
Expires: 1975-06-24
Abstract
No abstract record available.
Inventors
- 👤 William S Barnhart
- 👤 Joseph L Zollinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:09
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/46; C07C; C07C45/00; C07C45/004; C07C45/27; C07C45/29; C07C45/292; C07C45/298; C07C45/45; C07C45/455; C07C45/46; C07C49/00; C07C49/04; C07C49/16; C07C49/20; C07C49/227; C07C49/29; C07C49/327; C07C49/527; C07C49/567; C07C49/76; C07C49/80; C07C49/813
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A KETONE DERIVATIVE OF A PERCHLOROFLUOROCARBOXYLIC ACID HAVING NOT MORE THAN TWO CARBOXYL GROUPS, SAID KETONE HAVING AT LEAST ONE CHLORINE ATOM AND A
Claim 2
Dependent Claim
24 words
A KETONE DERIVATIVE OF A PERCHLOROFLUOROCARBOXYLIC ACID HAVING NOT MORE THAN TWO CARBOXYL GROUPS, SAID KETONE HAVING AT LEAST ONE CHLORINE ATOM AND A
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |