US3830739A
Expired / Lapsed
US
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Preparation of hyperbasic dispersions
Assignee: Witco Corp
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Filing: 1972-01-24
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Granted: 1974-08-20
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Expires: 1992-01-24
Abstract
Abstract A HYPERBASING PROCESS WHICH COMPRISES: (A)ADMIX SULFONIC ACID, METHANOL, CALCINUM BASE, AND VOLATILE HYDROCARBON SOLVENT; (B) TREAT WITH LESS THAN STOICHIOMETRIC AMOUNT OF CARBON DIOXIDE AT TEMPERATURE NOT OVER 35*C.; (C) ADD NONVOLITE DILUENT OIL; (D) HEAT TO REMOVE ALL VOLATILES; (E) TREAT WITH CARBON DIOXIDE TO CONVERT REMAINING CALCIUM BASE TO CALCIUM CARBONATE; AND (F) FILTER.
Inventors
- 👤 P Kemp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:38
CPC Classifications
C; C10; C10M; C10M3/00; C10M159/00; C10M159/12; C10M159/20; C10M159/24; C10M2201/00; C10M2201/06; C10M2201/062; C10M2201/063; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/024; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10N; C10N2010/00; C10N2010/04
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |