Patent US2539503A successfully refreshed from Google Patents.
US2539503A
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Lubricating compositions
Assignee: Individual
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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
2026-11-04 18:39
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; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
A FLUID ESTER LUBRICATING COMPOSITION, COMPRISING, AS THE BASE LUBRICANT, A BRANCHED CHAIN, LOWER ALKYL DI-ESTER OF SEBACIC ACID BLENDED WITH RUST AND OXIDATION INHIBITING PROPORTIONS, RESPECTIVELY, OF A POLYVALENT METAL SOAP OF A SATURATED FATTY ACID SUBSTITUTED BY AN ORGANIC RADICAL SELECTED FROM THE GROUP CONSISTING OF ARYL AND ALKYLARYL RADICALS AS A RUST INHIBITOR AND A PHENOLIC COMPOUND SUBSTITUTED BY AN ORGANIC RADICAL SELECTED FROM THE GROUP CONSISTING OF ARYL, ALKYL, ALKYLARYL AND AMINO RADICALS 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 |