US2767122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Translucency of lubricating oils
Assignee: National Research Council Canada
•
Filing: 1953-06-29
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Granted: 1956-10-16
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Expires: 1973-06-29
Abstract
No abstract record available.
Inventors
- 👤 Ira E Puddington
- 👤 Aurelio F Sirianni
- 👤 Farnand Joseph Redmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:02
CPC Classifications
C; C10; C10G; C10G31/00; C10G31/08; C10G27/00; C10M; C10M175/00; C10M175/0016
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
21 words
A METHOD FOR IMPROVING A LUBRICATING OIL COMPRISING TREATING THE OIL WITH AN OXIDISING AGENT IN THE PRESENCE OF SODIUM METAL.
References Cited (Backward Citations)
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US2070627A
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US2133457A
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US2210542A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |