Patent US3666407A successfully refreshed from Google Patents.
US3666407A
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US
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Process for producing synthetic hectorite-type clays
Assignee: HARCROS PIGMENTS Inc C/O HARRISONS & CROSFIELD (AMERICA) Inc
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Filing: 1971-01-28
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Granted: 1972-05-30
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Expires: 1991-01-28
Abstract
Abstract SYNTHETIC HECTORITE-TYPE CLAY MATERIALS ARE PREPARED BY CALCINING A MIXTURE OF LI2CO3 AND TALC, MIXING WITH AN AQUEOUS SOLUTION OF A SODIUM SILICATE AND NA2CO3, AND HYDROTHERMALLY TREATING THE RESULTING MISTURE, SUBSEQUENT DRYING IS OPTIONALLY PROVIDED.
Inventors
- 👤 Justus K Orlemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:55
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/40; C01B33/405; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C10; C10M; C10M177/00; C10M2201/00; C10M2201/14; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |