US2377909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions
Assignee: Shell Development Co
•
Filing: 1941-12-26
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Granted: 1945-06-12
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Expires: 1961-12-26
Abstract
No abstract record available.
Inventors
- 👤 Paul R Van Ess
- 👤 Ellis R White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:25
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/06; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L10/08; C10M; C10M133/00; C10M133/02; C10M133/16; C10M133/18; C10M133/20; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/286; C10M2207/287; C10M2207/32; C10M2207/34; C10M2211/00; C10M2211/04; C10M2211/044; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/10; C10M2215/102; C10M2215/18; C10M2215/24; C10M2215/26; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/04; C10M2219/042; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/064; C10M2219/066; C10M2219/08; C10M2219/082; C10M2219/085; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2227/00; C10M2227/06; C10N; C10N2010/00; C10N2010/10; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-06-11 | 1948-12-11 | 1949-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-06-11 | 1952-12-11 | 1953-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-06-11 | 1956-12-11 | 1957-06-12 | $7700.00 | Window Closed / Lapsed |