Patent US3810837A successfully refreshed from Google Patents.
US3810837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overbased sulfurized calcium alkylphenolate manufacture
Assignee: Texaco Inc
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Filing: 1972-06-27
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Granted: 1974-05-14
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Expires: 1992-06-27
Abstract
Abstract A METHOD OF PREPARING OVERBASED SULFURIZED ALKYLPHENOLATE OF ANTIOXIDANT PROPERTIES IN HYDROCARBON LUBRICATING OIL COMPRISING FIRST HEATING A MIXTURE OF SULFURIZED NORMAL CALCIUM ALKYLPHENOLATE, CALCIUM OXIDE, ALKANOIC ACID OF FROM 2 TO 3 CARBONS, ALKOXYETHANOL OF THE FORMULA ROCH2CH2OH WHERE R IS ALKYL OF FROM 1 TO 4 CARBONS, AND LUBRICATING OIL AND SUBSEQUENTLY CONTACTING THE HEATED MIXTURE WITH CARBON DIOXIDE.
Inventors
- 👤 H Chafetz
- 👤 W Channing
- 👤 B Morissette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:14
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/22
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |