Patent US3070544A successfully refreshed from Google Patents.
US3070544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clay beneficiation
Assignee: Monsanto Chemicals Ltd
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Filing: 1960-11-21
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Granted: 1962-12-25
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Expires: 1980-11-21
Abstract
No abstract record available.
Inventors
- 👤 William R Johnson
- 👤 David T Oakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:08
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; C09K8/24; C08; C08K; C08K3/00; C08K3/34; C08K3/346
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF AN INTIMATE ADMIXTURE OF A BENTONITIC CLAY AND A WATER-SOLUBLE INTERPOLYMER CONSISTING OF SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF AN OLEFIN HAVING FROM 2-4 CARBON ATOMS AND MALEIC ANHYDRIDE AND FROM ABOUT 0.1% TO ABOUT 5% BY WEIGHT OF DIALLYL ETHER, 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
72 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF AN INTIMATE ADMIXTURE OF A BENTONITIC CLAY AND A WATER-SOLUBLE INTERPOLYMER CONSISTING OF SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF AN OLEFIN HAVING FROM 2-4 CARBON ATOMS AND MALEIC ANHYDRIDE AND FROM ABOUT 0.1% TO ABOUT 5% BY WEIGHT OF DIALLYL ETHER, 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |