US3216934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clay beneficiation
Assignee: Monsanto Co
•
Filing: 1962-10-22
•
Granted: 1965-11-09
•
Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Raymond H Reinhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:50
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1305; Y; Y10; Y10S; Y10S507/00; Y10S507/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF AN INTIMATE ADMIXTURE OF A BENTONITIC CLAY AND A WATERSOLUBLE INTERPOLYMER CONSISTING OF SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF AN OLEFIN HAVING 2 TO 4 CARBON ATOMS AND MALEIC ANHYDRIDE AND FROM ABOUT 1% TO ABOUT 10% BY WEIGHT BASED ON THE REACTING MONOMERS OF HEXADIENE-1,5, SAID INTERPOLYMER HAVING A SPECIFIC VISCOSITY OF AT LEAST 0.3 AND SAID INTERPOLYMER BEING PRESENT IN AN AMOUNT SUFFICIENT TO INCREASE THE YIELD OF SAID CLAY.
Claim 2
Dependent Claim
77 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF AN INTIMATE ADMIXTURE OF A BENTONITIC CLAY AND A WATERSOLUBLE INTERPOLYMER CONSISTING OF SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF AN OLEFIN HAVING 2 TO 4 CARBON ATOMS AND MALEIC ANHYDRIDE AND FROM ABOUT 1% TO ABOUT 10% BY WEIGHT BASED ON THE REACTING MONOMERS OF HEXADIENE-1,5, SAID INTERPOLYMER HAVING A SPECIFIC VISCOSITY OF AT LEAST 0.3 AND SAID INTERPOLYMER BEING PRESENT IN AN AMOUNT SUFFICIENT TO INCREASE THE YIELD OF SAID CLAY.
References Cited (Backward Citations)
US2718497A
Cited
US2702788A
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US2948678A
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US3070543A
Cited
US3070544A
Cited
US3060155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |