US2293419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for solubilizing lubricating oil additives
Assignee: Shell Development Co
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Filing: 1941-05-27
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Granted: 1942-08-18
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Expires: 1961-05-27
Abstract
No abstract record available.
Inventors
- 👤 Paul R Van Ess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:55
CPC Classifications
C; C10; C10M; C10M129/00; C10M129/02; C10M129/26; C10M129/48; C10M129/54; C10M129/50; C10M131/00; C10M131/08; C10M131/12; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/10; C10M2207/14; C10M2207/141; C10M2207/142; C10M2207/144; C10M2207/146; C10M2207/26; C10M2207/262; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2211/00; C10M2211/04; C10M2211/044; C10M2215/00; C10M2215/02; C10M2215/06; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/086; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/14; C10N2010/16; C10N2070/00; C10N2070/02
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) | 1945-08-17 | 1946-02-16 | 1946-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-17 | 1950-02-16 | 1950-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-17 | 1954-02-16 | 1954-08-18 | $7700.00 | Window Closed / Lapsed |