Patent US4368308A successfully refreshed from Google Patents.
US4368308A
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US
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Fluorine-containing elastomer having excellent low temperature resistance and oil resistance
Assignee: AGC Inc
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Filing: 1981-07-01
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Granted: 1983-01-11
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Expires: 2001-07-01
Abstract
Abstract A fluorine-containing elastomer having excellent low temperature resistance and oil resistance comprises ethylene units (E) and fluorovinyl ether units (FV) having the formula CF2=CFOX (X represents a C1-C9 perfluoroalkyl group which can have one or more ether bond) at a molar ratio of (E) to (FV) of 95:5 to 30:70 and at a total content of (E) and (FV) of at least 70 mole %.
Inventors
- 👤 Masaaki Yamabe
- 👤 Shun-ichi Kodama
- 👤 Gen Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:45
CPC Classifications
C; C08; C08F; C08F216/00; C08F216/12; C08F216/14; C08F216/1408; C08F210/00; C08F210/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
71 words
A fluorine-containing elastomer having excellent low temperature resistance and oil resistance which comprises ethylene units (E) and fluorovinyl ether units (FV) having the formula CF 2 ═CFOX (X represents a C 1 -C 9 perfluoro-alkoxyalkyl group which can have one or more ether bond) at a molar ratio of (E) to (FV) of 95:5 to 30:70 and at a total content of (E) and (FV) of at least 70 mole %.
Claim 2
Dependent Claim
71 words
A fluorine-containing elastomer having excellent low temperature resistance and oil resistance which comprises ethylene units (E) and fluorovinyl ether units (FV) having the formula CF 2 ═CFOX (X represents a C 1 -C 9 perfluoro-alkoxyalkyl group which can have one or more ether bond) at a molar ratio of (E) to (FV) of 95:5 to 30:70 and at a total content of (E) and (FV) of at least 70 mole %.
Claim 3
Dependent Claim
14 words
The elastomer according to claim 1 wherein said fluorovinyl ether is perfluoro(2-n-propoxypropyl vinyl ether).
References Cited (Backward Citations)
US3180895A
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US3136745A
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US3235537A
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US3752789A
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US4170686A
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US4262101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |