US2676938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solutions comprising an ammonium salt of a copolymer of vinyl acetate and crotonic acid dissolved in a mixture of water and an alcohol
Assignee: EIDP Inc
•
Filing: 1952-01-31
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Granted: 1954-04-27
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Expires: 1972-01-31
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:31
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/095; C08J2331/00; C08J2331/02; C08J2331/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A SOLUTION COMPRISING THE AMMONIUM SALT OF A VINYL ACETATE/CROTONIC ACID COPOPLYMER CONTAINING 3 TO 7% BY WEIGHT OF CROTONIC ACID, ABOUT 1.5 TO 2 MOLES OF AMMONIUM ION PER MOLE OF COPOLYMERIZED CROTONIC ACID AND A MIXTURE OF 1 TO 5 PARTS BY VOLUME OF METHANOL AND 1 PART BY VOLUME OF WATER, SAID SOLUTION CONTAINING ABOUT 20 TO 50% BY WEIGHT OF SAID COPOLYMER AND HAVING A VISCOSITY BELOW 60,000 CENTIPOISES AT A TEMPERATURE OF 20 TO 30* C.
Claim 2
Dependent Claim
81 words
A SOLUTION COMPRISING THE AMMONIUM SALT OF A VINYL ACETATE/CROTONIC ACID COPOPLYMER CONTAINING 3 TO 7% BY WEIGHT OF CROTONIC ACID, ABOUT 1.5 TO 2 MOLES OF AMMONIUM ION PER MOLE OF COPOLYMERIZED CROTONIC ACID AND A MIXTURE OF 1 TO 5 PARTS BY VOLUME OF METHANOL AND 1 PART BY VOLUME OF WATER, SAID SOLUTION CONTAINING ABOUT 20 TO 50% BY WEIGHT OF SAID COPOLYMER AND HAVING A VISCOSITY BELOW 60,000 CENTIPOISES AT A TEMPERATURE OF 20 TO 30* C.
References Cited (Backward Citations)
US2317725A
Cited
US2375960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |