Patent US2691609A successfully refreshed from Google Patents.
US2691609A
Expired / Lapsed
US
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Polymeric styrene-maleamic acid and maleamate compositions and laminates
Assignee: EIDP Inc
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Filing: 1951-02-02
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Granted: 1954-10-12
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Expires: 1971-02-02
Abstract
No abstract record available.
Inventors
- 👤 Harold H Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:28
CPC Classifications
C; C09; C09J; C09J135/00; C09J135/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
A COMPOSITION COMPRISING POLYVINYL ALCOHOL AND A POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYMERIC AMMONIUM STYRENE-MALEAMATE AND POLYMERIC STYRENE-MALEAMIC ACID, SAID POLYMER HAVING AN ABSOLUTE VISCOSITY, WHEN DISPERSED IN WATER AND ADJUSTED TO PH 7.8 WITH AMMONIA TO GIVE A 15% SOLIDS CONTENT, OF AT LEAST 4700 CENTIPOISES BUT NOT EXCEEDING 10,000 CENTIPOISES MEASURED AT 25* C.
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) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |