Patent US3187216A successfully refreshed from Google Patents.
US3082178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition consisting of cellulose acetate and copolymer of n, n-dimethyl-acrylamide
Assignee: Eastman Kodak Co
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Filing: 1955-08-31
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Granted: 1963-03-19
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Expires: 1975-08-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:45
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/10; C08L1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A COMPOSITION OF MATTER CONSISTING OF 70-95% CELLLULOSE ACETATE AND 5-30% OF AN ACETONE-SOLUBLE COPOLYMER PREPARED FROM A MONOMERIC MIXTURE CONTAINING AT LEAST 65% N,N-DIMETHYLACRYLAMIDE WITH AT LEAST ONE UNSATURATED COMPOUND HAVING THE STRUCTURE:
Claim 2
Dependent Claim
34 words
A COMPOSITION OF MATTER CONSISTING OF 70-95% CELLLULOSE ACETATE AND 5-30% OF AN ACETONE-SOLUBLE COPOLYMER PREPARED FROM A MONOMERIC MIXTURE CONTAINING AT LEAST 65% N,N-DIMETHYLACRYLAMIDE WITH AT LEAST ONE UNSATURATED COMPOUND HAVING THE STRUCTURE:
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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |