Patent US2500498A successfully refreshed from Google Patents.
US2500498A
Expired / Lapsed
US
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Lubricant
Assignee: ExxonMobil Oil Corp
•
Filing: 1946-07-11
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Granted: 1950-03-14
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Expires: 1966-07-11
Abstract
No abstract record available.
Inventors
- 👤 Orland M Reiff
- 👤 Jr Harry J Andress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:04
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M2207/00; C10M2207/40; C10M2207/404; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/043; C10M2223/045; C10M2223/047; C10M2223/06; C10M2223/061; C10M2223/08; C10M2223/10; C10M2223/12; C10M2223/121; C10M2225/00; C10M2225/04; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
51 words
A MINERAL OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A VISCOUS MINERAL OIL FRACTION, A MINOR PROPORTION, FROM ABOUT 0.4 PER CENT TO ABOUT 1 PER CENT, OF AN ALKYL PHENYL PHOSPHITE AND A MINOR PROPORTION, FROM ABOUT 0.2 PER CENT TO ABOUT 1 PER CENT, OF A LOWER ALKYL-SUBSTITUTED THIOPHENE.
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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |