US2491432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized lubricant
Assignee: Shell Development Co
•
Filing: 1946-08-12
•
Granted: 1949-12-13
•
Expires: 1966-08-12
Abstract
No abstract record available.
Inventors
- 👤 White Ellis Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:45
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2221/00; C10M2221/04; C10M2221/043; C10N; C10N2040/00; C10N2040/06; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1793135A
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US2009118A
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US2213477A
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US2327053A
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US2293868A
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US2383915A
Cited
US2426549A
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US2434978A
Cited
US2425755A
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US2425845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |