Patent US2451048A successfully refreshed from Google Patents.
US2451048A
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US
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Lubricating oil addition agents
Assignee: Standard Oil Development Co
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Filing: 1944-03-23
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Granted: 1948-10-12
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Expires: 1964-03-23
Abstract
No abstract record available.
Inventors
- 👤 William J Sparka
- 👤 Donald C Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:11
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10M2205/06; C10M2205/20; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2217/00; C10M2217/02; C10M2217/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1178721A
Cited
US1910847A
Cited
US2142220A
Cited
US2180082A
Cited
US2213423A
Cited
US2420558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |