US2921930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thickening agents
Assignee: Beazer East Inc
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Filing: 1955-03-03
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Granted: 1960-01-19
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Expires: 1975-03-03
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Suhrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:58
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN IMPROVED THICKENING AGENT COMPRISING THE REACTION PRODUCT OF A STYRENE-ETHYLENICALLY UNSATURATED DIBASIC ACID COPOLYMER HAVING A STYRENE TO UNSATURATED ACID MOLAR RATIO OF ABOUT 1:1 TO 5:4 WITH ABOUT 1-5% BY WEIGHT, BASED UPON THE WEIGHT OF SAID COPOLYMER, OF A WATER-SOLUBLE POLYOXYETHYLENE ETHER OF A MONOHYDRIC ALIPHATIC ALCOHOL HAVING FROM 12-18 CARBON ATOMS, SAID REACTION PRODUCT BEING OBTAINED BY CONTACTING SAID COPOLYMER AND SAID ETHER AT A TEMPERATURE OF AT LEAST 70*C. AND BELOW THE DECOMPOSITION TEMPERATURE OF SAID REACTION PRODUCT UNTIL A PRODUCT OF INCREASED VISCOSITY IS OBTAINED.
Claim 2
Dependent Claim
91 words
AN IMPROVED THICKENING AGENT COMPRISING THE REACTION PRODUCT OF A STYRENE-ETHYLENICALLY UNSATURATED DIBASIC ACID COPOLYMER HAVING A STYRENE TO UNSATURATED ACID MOLAR RATIO OF ABOUT 1:1 TO 5:4 WITH ABOUT 1-5% BY WEIGHT, BASED UPON THE WEIGHT OF SAID COPOLYMER, OF A WATER-SOLUBLE POLYOXYETHYLENE ETHER OF A MONOHYDRIC ALIPHATIC ALCOHOL HAVING FROM 12-18 CARBON ATOMS, SAID REACTION PRODUCT BEING OBTAINED BY CONTACTING SAID COPOLYMER AND SAID ETHER AT A TEMPERATURE OF AT LEAST 70*C. AND BELOW THE DECOMPOSITION TEMPERATURE OF SAID REACTION PRODUCT UNTIL A PRODUCT OF INCREASED VISCOSITY IS OBTAINED.
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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |