US2589326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic phosphorus ester-p2s5 reaction products and oil compositions containing the same
Assignee: ExxonMobil Oil Corp
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Filing: 1949-12-21
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Granted: 1952-03-18
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Expires: 1969-12-21
Abstract
No abstract record available.
Inventors
- 👤 Edward A Oberright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:29
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C10; C10M; C10M1/00; C10M1/08; C10M2223/00; C10M2223/12; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
A MINERAL LUBRICATING OIL CONTAINING A SMALL AMOUNT, SUFFICIENT TO STABILIZE SAID OIL AGAINST OXIDATION, OF A PHOSPHORUS- AND SULFUR-CONTAINING PRODUCT OBTAINED BY REACTING FROM ABOUT 1/8 MOL TO ABOUT 1 MOL OF PHOSPHORUS PENTASULFIDE WITH 1 MOL OF ANY ALKENYL PHOSPHITE ESTER OF THE GENERAL FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |