Patent US3094501A successfully refreshed from Google Patents.
US3094501A
Expired / Lapsed
US
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Water loss control of aqueous cement slurries by addition of quaternary ammonium polymers or sulfonium polymers
Assignee: Dow Chemical Co
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Filing: 1960-05-09
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Granted: 1963-06-18
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Expires: 1980-05-09
Abstract
No abstract record available.
Inventors
- 👤 Winton W Wahl
- 👤 Charles D Dever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:57
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/16; C04B24/20; C04B24/22; C04B24/24; C04B24/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN AQUEOUS HYDRAULIC CEMENT SLURRY CONTAINING BY WEIGHT PER 100 PARTS OF AN HYDRAULIC CEMENT, BETWEEN 0.25 AND 1.8 PARTS OF A POLYMER SELECTED FROM THE CLASS CONSISTING OF POLY (AR-VINYLBENZYL) ALKYL- AND HYDROXYALKYLSUBSTITUTED QUATERNARY AMMONIUM BASES AND SALTS AND POLY (AR-VINYLBENZYL) SULFONIUM ALKYL- AND HYDROXYALKYLSUBSTITUTED BASES AND SALTS WHEREIN EACH ALKYL AND HYDROXYALKYL SUBSTITUENT CONTAINS NOT MORE THAN 4 CARBON ATOMS, THE TOTAL NUMBER OF CARBON ATOMS IN THE ALKYL AND HYDROXYALKYL SUBSTITUTED GROUPS IS NOT GREATER THAN 8, AND NO MORE THAN 1 HYDROXYALKYL GROUP IS PRESENT IN EACH RECURRING UNIT OF POLYMER, AND SUFFICIENT WATER TO MAKE A PUMPABLE SLURRY.
Claim 2
Dependent Claim
103 words
AN AQUEOUS HYDRAULIC CEMENT SLURRY CONTAINING BY WEIGHT PER 100 PARTS OF AN HYDRAULIC CEMENT, BETWEEN 0.25 AND 1.8 PARTS OF A POLYMER SELECTED FROM THE CLASS CONSISTING OF POLY (AR-VINYLBENZYL) ALKYL- AND HYDROXYALKYLSUBSTITUTED QUATERNARY AMMONIUM BASES AND SALTS AND POLY (AR-VINYLBENZYL) SULFONIUM ALKYL- AND HYDROXYALKYLSUBSTITUTED BASES AND SALTS WHEREIN EACH ALKYL AND HYDROXYALKYL SUBSTITUENT CONTAINS NOT MORE THAN 4 CARBON ATOMS, THE TOTAL NUMBER OF CARBON ATOMS IN THE ALKYL AND HYDROXYALKYL SUBSTITUTED GROUPS IS NOT GREATER THAN 8, AND NO MORE THAN 1 HYDROXYALKYL GROUP IS PRESENT IN EACH RECURRING UNIT OF POLYMER, AND SUFFICIENT WATER TO MAKE A PUMPABLE SLURRY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |