US3781203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thickened acid compositions and methods for making same
Assignee: GAF Chemicals Corp
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Filing: 1971-03-17
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Granted: 1973-12-25
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Expires: 1991-03-17
Abstract
Abstract A COMPOSITION ADAPTED FOR THE THICKING OF AQUEOUS ACID COMPOSITIONS, SUCH COMPOSITIONS SO THICKENED, AND A METHOD FOR PREPARING SUCH THICKENING COMPOSITIONS, SUCH THICKENING COMPOSITIONS CONSISTING ESSENTIALLY OF THE INTERACTION PRODUCT OF (A) POLYVINYL ALCOHOL CONTAINING FROM 1 TO 20% UNSAPONIFIED 1 TO 4 CARBON ATOM FATTY ACID ESTER GROUPS WITH (B) AN EQUIMOLAR IMTERPOLYMER OF AN A,B-UNSATURATED ALIPHATIC DICARBOXYLIC ACID ANHYDRIDE WITH AN A-OLEFINIC COMONOMER SELECTED FROM THE GROUP CONSISTING OF ALKYL VINYL ETHERS, VINYL ESTERS, A-OLEFINS, ACRYLIC ACIDS AND ACRYLIC ACIDS ESTERS, (A) AND (B) BEING PRESENT IN THE MOLAR RATIO OF 100:1 TO 1:10.
Inventors
- 👤 R Clark
- 👤 M Freifeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:51
CPC Classifications
C; C08; C08G; C08G81/00; C08G81/02; C08G81/021; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C09D7/44; C08L; C08L29/00; C08L29/02; C08L29/04; C08L35/00; C08L35/08; Y; Y10; Y10S; Y10S507/00; Y10S507/933
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |