Patent US2498792A successfully refreshed from Google Patents.
US2498792A
Expired / Lapsed
US
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Polyvinyl resin emulsions
Assignee: Rhone Poulenc SA
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Filing: 1946-01-23
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Granted: 1950-02-28
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Expires: 1966-01-23
Abstract
No abstract record available.
Inventors
- 👤 Cottet Emile Clement
- 👤 Fernand Rene Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:29
CPC Classifications
C; C08; C08L; C08L31/00; C08L31/02; C08L31/04; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C09; C09D; C09D131/00; C09D131/02; C09D131/04; C08L99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AN AQUEOUS EMULSION OF POLYVINYL ACETATE CONTAINING UP TO 65% OF DRY RESIN, A MEMBER SELECTED FROM THE CLASS CONSISTING OF THE ALKALINE SALTS OF THE SULPHONATION PRODUCTS OF ALKYLATED POLYNUCLEAR COMPOUNDS AND, AS PROTECTIVE COLLOID, A POLYPEPTIDE OBTAINED BY HEATING TO BOILING A 40% BY WEIGHT AQUEOUS SOLUTION OF GELATINE UNTIL THE PRODUCT, DILUTED TO A 20% SOLUTION, HAS A VISCOSITY AT 35*C. OF 6 TO 15 CENTIPOSIES.
Claim 2
Dependent Claim
69 words
AN AQUEOUS EMULSION OF POLYVINYL ACETATE CONTAINING UP TO 65% OF DRY RESIN, A MEMBER SELECTED FROM THE CLASS CONSISTING OF THE ALKALINE SALTS OF THE SULPHONATION PRODUCTS OF ALKYLATED POLYNUCLEAR COMPOUNDS AND, AS PROTECTIVE COLLOID, A POLYPEPTIDE OBTAINED BY HEATING TO BOILING A 40% BY WEIGHT AQUEOUS SOLUTION OF GELATINE UNTIL THE PRODUCT, DILUTED TO A 20% SOLUTION, HAS A VISCOSITY AT 35*C. OF 6 TO 15 CENTIPOSIES.
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 |