Patent US2539504A successfully refreshed from Google Patents.
US2539504A
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Lubricating composition
Assignee: Individual
•
Filing: 1945-02-03
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Granted: 1951-01-30
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Expires: 1965-02-03
Abstract
No abstract record available.
Inventors
- 👤 William A Zisman
- 👤 Jr Charles M Murphy
- 👤 John K Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:49
CPC Classifications
G; G04; G04B; G04B31/00; G04B31/08; C; C10; C10M; C10M3/00; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/064; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
46 words
A FLUID ESTER LUBRICATING COMPOSITION, CONSISTING ESSENTIALLY OF, AS THE BASE LUBRICANT, DI(1-ETHYL PROPYL) AZELATE BLENDED WITH RUST AND OXIDATION INHIBITING PROPORTIONS, RESPECTIVELY, OF A POLYVALENT METAL SOAP OF A SUBSTITUTED FATTY ACID AS A RUST INHIBITOR AND A SUBSTITUTED PHENOLIC COMPOUND AS AN OXIDATION INHIBITOR.
References Cited (Backward Citations)
US2417281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |