US2595169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam turbine lubricants
Assignee: Standard Oil Development Co
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Filing: 1946-01-25
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Granted: 1952-04-29
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Expires: 1966-01-25
Abstract
No abstract record available.
Inventors
- 👤 Harry W Rudel
- 👤 Jones I Wasson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:23
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/28; C10M2207/287; C10M2207/288; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/085; C10N; C10N2040/00; C10N2040/135
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A LUBRICTING COMPOSITION CONSISTING ESSENTIALLY OF MINERAL BASE LUBRICATING OIL CONTAINING 0.01 TO 0.5% BY WEIGHT, OF A COMPOUND SELECTED FROM THE CLASS WHICH CONSISTS OF THIOETHER SUBSTITUTED TETRAHYDROPHTHALIC AND HEXAHYDROPHTHALIC ACIDS, AND THE ANHYDRIDES, AND MONOESTERS THEREOF HAVING AT LEAST ONE THIOETHER SUBSTITUTION INCLUDING ONE ORGANIC RADICAL ATTACHED IN ALPHA POSITION TO AN ACYL RADICAL THROUGH A THIOETHER LINKAGE.
Claim 2
Dependent Claim
60 words
A LUBRICTING COMPOSITION CONSISTING ESSENTIALLY OF MINERAL BASE LUBRICATING OIL CONTAINING 0.01 TO 0.5% BY WEIGHT, OF A COMPOUND SELECTED FROM THE CLASS WHICH CONSISTS OF THIOETHER SUBSTITUTED TETRAHYDROPHTHALIC AND HEXAHYDROPHTHALIC ACIDS, AND THE ANHYDRIDES, AND MONOESTERS THEREOF HAVING AT LEAST ONE THIOETHER SUBSTITUTION INCLUDING ONE ORGANIC RADICAL ATTACHED IN ALPHA POSITION TO AN ACYL RADICAL THROUGH A THIOETHER LINKAGE.
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) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |