US2647933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making of rfbr from rfcooh
Assignee: 3M Co
•
Filing: 1951-02-19
•
Granted: 1953-08-04
•
Expires: 1971-02-19
Abstract
No abstract record available.
Inventors
- 👤 Zerte James D La
- 👤 Wilbur H Pearlson
- 👤 Edward A Kauck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:50
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
THE METHOD OF PRODUCING PERFLUOROCARBON BROMIDES WHICH COMPRISES REACTING BROMINE WITH A COMPOUND FROM THE GROUP CONSISTING OF PERFLUOROCARBON ACIDS AND THEIR ANHYDRIDES.
Claim 2
Independent Claim
23 words
THE METHOD OF PRODUCING PERFLUOROCARBON BROMIDES WHICH COMPRISES REACTING BROMINE WITH A COMPOUND FROM THE GROUP CONSISTING OF PERFLUOROCARBON ACIDS AND THEIR ANHYDRIDES.
References Cited (Backward Citations)
US2436135A
Cited
US2554219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |