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Patent US2656337A successfully refreshed from Google Patents.
US2656337A
Expired / Lapsed
US
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Copolymers of acrylonitrile and allyl and 2-methallyl chlorides
Assignee: Eastman Kodak Co
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Filing: 1949-12-28
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Granted: 1953-10-20
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Expires: 1969-12-28
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:58
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A BINARY COPOLYMER OF FROM 65 TO 95 PER CENT BY WEIGHT OF ACRYLONITRILE AND FROM 35 TO 5 PER CENT BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALLYL CHLORIDE AND 2METHALLYL CHLORIDE.
Claim 2
Dependent Claim
37 words
A BINARY COPOLYMER OF FROM 65 TO 95 PER CENT BY WEIGHT OF ACRYLONITRILE AND FROM 35 TO 5 PER CENT BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALLYL CHLORIDE AND 2METHALLYL CHLORIDE.
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |