US2775559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved lubricants
Assignee: Phillips Petroleum Co
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Filing: 1951-08-01
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Granted: 1956-12-25
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Expires: 1971-08-01
Abstract
No abstract record available.
Inventors
- 👤 Chester M Himel
- 👤 Lee O Edmonds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:07
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/20; C07; C07C; C07C313/00; C07C313/08; C10M2219/00; C10M2221/00; C10M2221/02; C10N; C10N2040/00; C10N2040/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
AN IMPROVED LUBRICANT COMPRISING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL CONTAINING AN ALKYLENE POLYAMINE PARTIALLY N-SUBSTITUTED WITH AT LEAST ONE OF RS- AND RSS- IN WHICH R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, SUBSTITUTED ALKYL, ARYL, SUBSTITUTED ARLY, ARALKYL AND SUBSTITUTED ARALKYL, IN AN AMOUNT SUFFICIENT TO IMPART ANTIOXIDANT AND ANTICORROSIVE CHARACTERISTICS TO SAID LUBRICANT, BUT LESS THAN 8 WEIGHT PERCENT OF SAID OIL.
Claim 2
Dependent Claim
70 words
AN IMPROVED LUBRICANT COMPRISING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL CONTAINING AN ALKYLENE POLYAMINE PARTIALLY N-SUBSTITUTED WITH AT LEAST ONE OF RS- AND RSS- IN WHICH R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, SUBSTITUTED ALKYL, ARYL, SUBSTITUTED ARLY, ARALKYL AND SUBSTITUTED ARALKYL, IN AN AMOUNT SUFFICIENT TO IMPART ANTIOXIDANT AND ANTICORROSIVE CHARACTERISTICS TO SAID LUBRICANT, BUT LESS THAN 8 WEIGHT PERCENT OF SAID OIL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |