Patent US2390695A successfully refreshed from Google Patents.
US2631998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers obtained from trifluorochloroethylene and 1-fluoro-1-chloroethylene
Assignee: Akzo Nobel UK PLC
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Filing: 1948-10-01
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Granted: 1953-03-17
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Expires: 1968-10-01
Abstract
No abstract record available.
Inventors
- 👤 Pearson Frank Gardiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:59
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
THE COPOLYMERIZATION PRODUCT OF TRIFLUOROCHLORETHYLENE AND 1-FLUORO-1-CHLORETHYLENE CONTAINING FROM 60 TO 90 MOLE PER CENT OF TRIFLUOROCHLORETHYLENE AND FROM 10 TO 30 MOLE PER CENT OF 1-FLUORO-1-CHLORETHYLENE IN THE COPOLYMER MOLECULE.
Claim 2
Dependent Claim
31 words
THE COPOLYMERIZATION PRODUCT OF TRIFLUOROCHLORETHYLENE AND 1-FLUORO-1-CHLORETHYLENE CONTAINING FROM 60 TO 90 MOLE PER CENT OF TRIFLUOROCHLORETHYLENE AND FROM 10 TO 30 MOLE PER CENT OF 1-FLUORO-1-CHLORETHYLENE IN THE COPOLYMER MOLECULE.
References Cited (Backward Citations)
GB465520A
Cited
US2328510A
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GB570941A
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US2419008A
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US2513312A
Cited
GB596943A
Cited
US2479367A
Cited
US2497046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |