Patent US2662072A successfully refreshed from Google Patents.
US2662072A
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Process for copolymerizing ce=cf2 with of=cfci
Assignee: Individual
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Filing: 1948-06-30
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Granted: 1953-12-08
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Expires: 1968-06-30
Abstract
No abstract record available.
Inventors
- 👤 William T Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:42
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/24; C08F214/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE METHOD WHICH COMPRISES COPOLYMERIZING TETRAFLUOROETHYLENE AND TRIFLUOROMONOCHLOROETHYLENE IN THE PRESENCE OF TRICHLOROACETYL PEROXIDE AS A POLYMERIZATION PROMOTER AT A TEMPERATURE IN THE RANGE OF -20* C. TO 0* C. TO PRODUCE A PLASTIC COPOLYMER COMPOSED OF ABOUT 25% TO ABOUT 85% BY WEIGHT OF TETRAFLUOROETHYLENE
Claim 2
Independent Claim
46 words
THE METHOD WHICH COMPRISES COPOLYMERIZING TETRAFLUOROETHYLENE AND TRIFLUOROMONOCHLOROETHYLENE IN THE PRESENCE OF TRICHLOROACETYL PEROXIDE AS A POLYMERIZATION PROMOTER AT A TEMPERATURE IN THE RANGE OF -20* C. TO 0* C. TO PRODUCE A PLASTIC COPOLYMER COMPOSED OF ABOUT 25% TO ABOUT 85% BY WEIGHT OF TETRAFLUOROETHYLENE
References Cited (Backward Citations)
FR796026A
Cited
GB583482A
Cited
US2393967A
Cited
US2462042A
Cited
GB593605A
Cited
US2456255A
Cited
US2531134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |