US2499097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoreversible gels of hydrolyzed vinyl fluoride/vinyl acetate copolymers
Assignee: EIDP Inc
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Filing: 1945-09-21
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Granted: 1950-02-28
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Expires: 1965-09-21
Abstract
No abstract record available.
Inventors
- 👤 Benjamin W Howk
- 👤 Jr Louis Plambeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:39
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J2329/00; C08J2329/02; C08J2329/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A THERMALLY REVERSIBLE GEL ESSENTIALLY CONSISTING OF FROM 2 TO 5% BY WEIGHT OF A HYDROLYZED INTERPOLYMER THE RECURRING UNITS OF WHICH CONSIST OF ONE VINYL FLUORIDE RADICAL AND FROM SIX TO THIRTY RADICALS OF THE GROUP CONSISTING OF VINYL ALCOHOL AND VINYL ESTERS OF AN ORGANIC MONO CARBOXYLIC ACID FREE FROM NON-BENZENOID CARBONTO-CARBON UNSATURATION, IN WHICH ANY CARBON ATOM ALPHA TO THE CARBON ATOM IN THE CARBOXYL GROUP OF SAID ACID IS ATTACHED TO AT LEAST ONE BUT NOT MORE THAN THREE CARBON ATOMS, AND WHEREIN THE RATIO OF VINYL ALCOHOL TO VINYL ESTER RADICALS IS AT LEAST 19 TO 1, AND A SOLVENT CONSISTING OF WATER AND UP TO 25% OF ALCOHOL BASED ON THE WEIGHT OF THE SOLVENT.
Claim 2
Dependent Claim
121 words
A THERMALLY REVERSIBLE GEL ESSENTIALLY CONSISTING OF FROM 2 TO 5% BY WEIGHT OF A HYDROLYZED INTERPOLYMER THE RECURRING UNITS OF WHICH CONSIST OF ONE VINYL FLUORIDE RADICAL AND FROM SIX TO THIRTY RADICALS OF THE GROUP CONSISTING OF VINYL ALCOHOL AND VINYL ESTERS OF AN ORGANIC MONO CARBOXYLIC ACID FREE FROM NON-BENZENOID CARBONTO-CARBON UNSATURATION, IN WHICH ANY CARBON ATOM ALPHA TO THE CARBON ATOM IN THE CARBOXYL GROUP OF SAID ACID IS ATTACHED TO AT LEAST ONE BUT NOT MORE THAN THREE CARBON ATOMS, AND WHEREIN THE RATIO OF VINYL ALCOHOL TO VINYL ESTER RADICALS IS AT LEAST 19 TO 1, AND A SOLVENT CONSISTING OF WATER AND UP TO 25% OF ALCOHOL BASED ON THE WEIGHT OF THE SOLVENT.
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) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |