Patent US2765276A successfully refreshed from Google Patents.
US2765276A
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Lubricating compositions
Assignee: Shell Development Co
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Filing: 1955-05-19
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Granted: 1956-10-02
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Expires: 1975-05-19
Abstract
No abstract record available.
Inventors
- 👤 John L Van Winkle
- 👤 Edward R Bell
- 👤 Rupert C Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:17
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2608; C10M; C10M137/00; C10M137/16; C10L1/2616; C10M2203/00; C10M2203/06; C10M2205/00; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/107; C10M2211/00; C10M2211/02; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/08; C10M2219/082; C10M2221/00; C10M2221/04; C10M2221/043; C10M2223/00; C10M2223/06; C10M2223/063; C10M2223/065; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A COMPOSITION OF MATTER COMPRISING A MAJOR AMOUNT OF A LUBRICATING OIL AND A MINOR AMOUNT, SUFFICIENT TO IMPART EXTREME PRESSURE PROPERTIES TO SAID LIQUID OIL, OF A COMPOUND HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
33 words
A COMPOSITION OF MATTER COMPRISING A MAJOR AMOUNT OF A LUBRICATING OIL AND A MINOR AMOUNT, SUFFICIENT TO IMPART EXTREME PRESSURE PROPERTIES TO SAID LIQUID OIL, OF A COMPOUND HAVING THE GENERAL FORMULA
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) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |