US2691001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral lubricating oil composition
Assignee: Standard Oil Development Co
•
Filing: 1952-07-23
•
Granted: 1954-10-05
•
Expires: 1972-07-23
Abstract
No abstract record available.
Inventors
- 👤 Elmer B Cyphers
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:15
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A MINERAL LUBRICATING OIL COMPOSITION CONTAINING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL AND DISSOLVED THEREIN A MINOR OXIDATION INHIBITING AMOUNT 4,4''-ISOPROPYLIDINE BIS (2ISOPROPYLPHENOL).
Claim 2
Dependent Claim
25 words
A MINERAL LUBRICATING OIL COMPOSITION CONTAINING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL AND DISSOLVED THEREIN A MINOR OXIDATION INHIBITING AMOUNT 4,4''-ISOPROPYLIDINE BIS (2ISOPROPYLPHENOL).
References Cited (Backward Citations)
US2017827A
Cited
US2295985A
Cited
US2515906A
Cited
US2482748A
Cited
US2591651A
Cited
US2636002A
Cited
US2651572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |