US3003979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry cement composition comprising cellulosic thickener gelled starch, polyvinyl alcohol and polyvinyl acetate
Assignee: United States Gypsum Co
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Filing: 1958-12-05
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Granted: 1961-10-10
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Expires: 1978-12-05
Abstract
No abstract record available.
Inventors
- 👤 Mitchell P Ptasienski
- 👤 Joseph W Gill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:00
CPC Classifications
C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C04; C04B; C04B28/00; C04B28/02; C09; C09J; C09J129/00; C09J129/02; C09J129/04; C08L1/00; C08L2666/00; C08L2666/02; C08L2666/54; C08L3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A DRY CEMENT COMPOSITION COMPRISING FROM ABOUT .3 TO 1% BY WEIGHT OF A COLD-WATER SOLUBLE CELLULOSIC THICKENER CONTAINING ONLY ETHER AND HYDROXYL OXYGEN, ABOUT 4.5 TO 12% BY WEIGHT OF A BINDER COMPRISING A TERNARY MIXTURE OF ACID-HYDROLYZED PRE-GELLED STARCH, COLD-WATER SOLUBLE POLYVINYL ALCOHOL WHICH IS NOT COMPLETELY HYDROYLZED BUT WHICH IS AT LEAST 75% HYDROLYZED, AND POLYVINYL ALCOHOL-STABILIZED POLYVINYL ACETATE, AND ABOUT 87 TO 95% BY WEIGHT FILLERS.
Claim 2
Dependent Claim
70 words
A DRY CEMENT COMPOSITION COMPRISING FROM ABOUT .3 TO 1% BY WEIGHT OF A COLD-WATER SOLUBLE CELLULOSIC THICKENER CONTAINING ONLY ETHER AND HYDROXYL OXYGEN, ABOUT 4.5 TO 12% BY WEIGHT OF A BINDER COMPRISING A TERNARY MIXTURE OF ACID-HYDROLYZED PRE-GELLED STARCH, COLD-WATER SOLUBLE POLYVINYL ALCOHOL WHICH IS NOT COMPLETELY HYDROYLZED BUT WHICH IS AT LEAST 75% HYDROLYZED, AND POLYVINYL ALCOHOL-STABILIZED POLYVINYL ACETATE, AND ABOUT 87 TO 95% BY WEIGHT FILLERS.
References Cited (Backward Citations)
US2764568A
Cited
US2850468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |