US3700474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increase in clay responsiveness to wetting
Assignee: International Minerals and Chemical Corp
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Filing: 1970-12-09
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Granted: 1972-10-24
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Expires: 1990-12-09
Abstract
Abstract A METHOD FOR TREATING A PLATEY-TYPE CLAY NAMELY, A CLAY SUCH AS BENTONITE HAVING A MICACEOUS SHEET STRUCTURE, TO MAKE IT MORE READILY SLAKABLE IN WATER, WHICH COMPRISES COMPACTING FINE PARTICLES OF THE CLAY, HAVING A MAXINUM MOISTURE CONTENT OF ABOUT 20% BY WEIGHT OF WATER, INTO SHEET FORM, AND CRUSHING THE CLAY SHEET THUS FORMED.
Inventors
- 👤 William J Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:07
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61Q; A61Q19/00; C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/36; C01B33/38; C01B33/40; C01B33/42; C01B33/46; C04; C04B; C04B33/00; C04B33/02; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/05; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; Y; Y10; Y10S; Y10S264/00; Y10S264/39
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |