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Patent US2875166A successfully refreshed from Google Patents.
US2875166A
Expired / Lapsed
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Method of thickening aqueous dispersions with a divalent metal acrylate and product thereof
Assignee: Rohm and Haas Co
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Filing: 1954-09-20
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Granted: 1959-02-24
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Expires: 1974-09-20
Abstract
No abstract record available.
Inventors
- 👤 Robert P Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:12
CPC Classifications
D; D06; D06M; D06M14/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
THE METHOD OF THICKENING AN AQUEOUS DISPERSION CONTAINING A NON-IONIC DISPERSING AGENT COMPRISING ADDING THERETO 1% TO 10% BY WEIGHT, BASED ON THE WEIGHT OF THE DISPERSION, OF A WATER-SOLUBLE DIVALENT METAL ACRYLATE AND A PEROXY POLYMERIZATION CATALYST AND ALLOWING THE ACRYLATE TO POLYMERIZE IN THE SITU AT A TEMPERATURE FROM BELOW ROOM TEMPERATURE TO ABOUT 100*C. TO THEREBY THICKNESS THE DISPERSION.
Claim 2
Independent Claim
62 words
THE METHOD OF THICKENING AN AQUEOUS DISPERSION CONTAINING A NON-IONIC DISPERSING AGENT COMPRISING ADDING THERETO 1% TO 10% BY WEIGHT, BASED ON THE WEIGHT OF THE DISPERSION, OF A WATER-SOLUBLE DIVALENT METAL ACRYLATE AND A PEROXY POLYMERIZATION CATALYST AND ALLOWING THE ACRYLATE TO POLYMERIZE IN THE SITU AT A TEMPERATURE FROM BELOW ROOM TEMPERATURE TO ABOUT 100*C. TO THEREBY THICKNESS THE DISPERSION.
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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |