US3557037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rheological property-modified particle suspensions in organic liquids
Assignee: GEORGE W COLLINS
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Filing: 1966-12-23
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Granted: 1971-01-19
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Expires: 1986-12-23
Abstract
Abstract THE RHEOLOGICAL PROPERTIES OF PARTICLE SUSPENSIONS IN ORGANIC LIQUIDS, SUCH AS PIGMENT SUSPENSIONS FOR PAINTS, ARE MODIFIED BY INCORPORATING IN THE SUSPENSION AS A RHEOLOGICAL PROPERTY MODIFYING AGENT A COPOLYMER OF ETHYLENE AND AN UNSATRATED ORGANIC ACID, THE COPOLYMER CONTAINING FREE CARBOXYL GROUPS AND HAVING AN ACID NUMBER OF BETWEEN ABOUT 2 AND 75, A MOLECULAR WEIGHT OF BETWEEN ABOUT 1,000 AND 8,000 A SOFTENING POINT OF BETWEEN 205 AND 240*F. AND A PENETRATION HARDNESS OF BETWEEN ABOUT 1 AND 8.
Inventors
- 👤 George W Collins
- 👤 Frank A Baron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:07
CPC Classifications
C; C09; C09D; C09D7/00; C09D7/40; C09D7/45; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/02
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |