Patent US2687938A successfully refreshed from Google Patents.
US2687938A
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Ternary acrylonitrile polymers
Assignee: Akzo Nobel UK PLC
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Filing: 1950-05-06
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Granted: 1954-08-31
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Expires: 1970-05-06
Abstract
No abstract record available.
Inventors
- 👤 David W Chaney
- 👤 Howard M Hoxie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:53
CPC Classifications
C; C08; C08F; C08F26/00; C08F26/06; C08F20/00; C08F20/02; C08F20/08; C08F20/42; C08F220/00; C08F220/02; C08F220/42; C08F220/44; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A TERNARY COPOLYMER OF, BY WEIGHT, (1) FROM 70 TO 98 PERCENT OF ACRYLONITRILE, (2) FROM 1 TO 10 PERCENT OF A VINYL-SUBSTITUTED TERTIARY HETEROCYCLIC AMINE AND (3) FROM 1 TO 20 PERCENT OF VINYL ACETATE.
Claim 2
Dependent Claim
36 words
A TERNARY COPOLYMER OF, BY WEIGHT, (1) FROM 70 TO 98 PERCENT OF ACRYLONITRILE, (2) FROM 1 TO 10 PERCENT OF A VINYL-SUBSTITUTED TERTIARY HETEROCYCLIC AMINE AND (3) FROM 1 TO 20 PERCENT OF VINYL ACETATE.
References Cited (Backward Citations)
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US2478378A
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US2471959A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |