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Patent US2506537A successfully refreshed from Google Patents.
US2506537A
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Reversible gel composition
Assignee: GAF Chemicals Corp
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Filing: 1948-10-22
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Granted: 1950-05-02
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Expires: 1968-10-22
Abstract
No abstract record available.
Inventors
- 👤 Carl E Barnes
- 👤 Jr William O Ney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:10
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C08L33/00; C08L33/24; C08L33/26; C08L33/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A FIRM THERMAL-REVERSIBLE AQUA-GEL HAVING A PH OF 4-9, CONTAINING, AS THE GEL-FORMING CONSTITUENTS THEREOF, A WATER SOLUBLE POLYVINYL ALCOHOL AND AN INTERPOLYMERIC PRODUCT OBTAINED FROM A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND A-SUBSTITUTED ACRYLIC ACIDS WITH AN AMIDE OF SAID ACIDS IN WHICH THE RESPECTIVE AMOUNTS OF SAID ACIDS AND OF SAID AMIDE ARE EACH AT LEAST 25% BY WEIGHT OF THE INTERPOLYMER, THE WEIGHT RATIO OF THE AMOUNTS OF POLYVINYL, ALCOHOL AND OF SAID INTERPOLYMERIC PRODUCT BEING WITHIN THE RANGE OF 1:9 TO 9:1.
Claim 2
Dependent Claim
90 words
A FIRM THERMAL-REVERSIBLE AQUA-GEL HAVING A PH OF 4-9, CONTAINING, AS THE GEL-FORMING CONSTITUENTS THEREOF, A WATER SOLUBLE POLYVINYL ALCOHOL AND AN INTERPOLYMERIC PRODUCT OBTAINED FROM A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND A-SUBSTITUTED ACRYLIC ACIDS WITH AN AMIDE OF SAID ACIDS IN WHICH THE RESPECTIVE AMOUNTS OF SAID ACIDS AND OF SAID AMIDE ARE EACH AT LEAST 25% BY WEIGHT OF THE INTERPOLYMER, THE WEIGHT RATIO OF THE AMOUNTS OF POLYVINYL, ALCOHOL AND OF SAID INTERPOLYMERIC PRODUCT BEING WITHIN THE RANGE OF 1:9 TO 9:1.
References Cited (Backward Citations)
US2249537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |