US2596650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of acrylonitrile and nu-allyl and nu-2-methallyl acylamides
Assignee: Eastman Kodak Co
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Filing: 1949-12-28
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Granted: 1952-05-13
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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
2026-10-27 04:53
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A COPOLYMER OF FROM 60 TO 98% BY WEIGHT OF ACRYLONITRILE AND FROM 40 TO 2% BY WEIGHT OF AN ACYLAMIDE COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
26 words
A COPOLYMER OF FROM 60 TO 98% BY WEIGHT OF ACRYLONITRILE AND FROM 40 TO 2% BY WEIGHT OF AN ACYLAMIDE COMPOUND HAVING THE GENERAL FORMULA:
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) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |