US2566255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partially hydrolyzed interpolymers of acrylonitrile with vinyl esters and products therefrom
Assignee: EIDP Inc
•
Filing: 1946-04-16
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Granted: 1951-08-28
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Expires: 1966-04-16
Abstract
No abstract record available.
Inventors
- 👤 Albert F Smith
- 👤 Halsey B Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:53
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A MACROMOLECULAR, PARTIALLY HYDROLYZED INTERPOLYMER OF ACRYLONITRILE WITH A VINYL ESTER OF ORGANIC MONOCARBOXYLIC ACID, SAID PARTIALLY HYDROLYZED INTERPOLYMER BEING SOLUBLE IN DIMETHYLFORMAMIDE, HAVING SUBSTANTIAL WET STRENGTH WHEN IN THE FORM OF AN UNTREATED PELLICLE AND HAVING THE EMPIRICAL FORMULA
Claim 2
Dependent Claim
40 words
A MACROMOLECULAR, PARTIALLY HYDROLYZED INTERPOLYMER OF ACRYLONITRILE WITH A VINYL ESTER OF ORGANIC MONOCARBOXYLIC ACID, SAID PARTIALLY HYDROLYZED INTERPOLYMER BEING SOLUBLE IN DIMETHYLFORMAMIDE, HAVING SUBSTANTIAL WET STRENGTH WHEN IN THE FORM OF AN UNTREATED PELLICLE AND HAVING THE EMPIRICAL FORMULA
References Cited (Backward Citations)
GB387976A
Cited
US2118863A
Cited
US2118864A
Cited
US2332899A
Cited
US2388851A
Cited
US2403464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |