US2865824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polymers of ethylenically unsaturated fluorine-containing compounds
Assignee: Honeywell International Inc
•
Filing: 1954-04-02
•
Granted: 1958-12-23
•
Expires: 1974-04-02
Abstract
No abstract record available.
Inventors
- 👤 Jean W Borland
- 👤 Charles B Miller
- 👤 John H Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:32
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
A METHOD OF PREPARING POLYTRIFLUOROCHLOROETHYLENE HAVING AN N. S. T. VALUE IN EXCESS OF ABOUT 300*C. WHICH COMPRISES SUBJECTING 1,1,2-TRIFLUORO - 2 - CHLOROETHYLENE AS SOLE CHARGE TO A SOURCE OF GAMMA RADIATION HAVING A STRENGTH OF AT LEAST 5 CURIES AT A TEMPERATURE OF ABOUT -15* TO +15*C. FOR A TIME SUFFICIENT TO OBTAIN SAID DESIRED POLYMERIZATION.
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) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |