Patent US3591497A successfully refreshed from Google Patents.
US3591497A
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Demulsification of hydraulic oils using group ii metal sulfonates and hydroxylic combinations
Assignee: Chevron USA Inc
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Filing: 1968-09-16
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Granted: 1971-07-06
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Expires: 1988-09-16
Abstract
Abstract EMULSIBILITY OF OILS HAVING MATERIAL CONTACT WITH WATER, E.G., HYDRAULIC OILS, IS SIGNIFICANTLY REDUCED BY THE ADDITION OF ALKANOLS OR DIOLS IN COMBINATION WITH A GROUP II METAL SULFONATE.
Inventors
- 👤 James H Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:50
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/083; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/08; C10N2040/12; C10N2040/13; C10N2040/135
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |