US2842497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus esters containing diarylamines and polyepoxypolyhydroxy polyethers
Assignee: Shell Development Co
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Filing: 1953-01-05
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Granted: 1958-07-08
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Expires: 1973-01-05
Abstract
No abstract record available.
Inventors
- 👤 Forrest J Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:21
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C10; C10M; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2209/08; C10M2209/084; C10M2209/10; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/06; C10M2223/061; C10M2223/065; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR AMOUNT OF A TRIALKYLPHOSPHATE, EACH ALKYL RADICAL OF WHICH CONTAINS AT LEAST SIX CARBON ATOMS, SAID PHOSPHATE CONTAINING 18-32 CARBON ATOMS AND FROM ABOUT 0.25% TO ABOUT 5% BY WEIGHT EACH OF A CONDENSATION PRODUCT OF ABOUT EQUIMOLAR PROPORTIONS OF A BIS(HYDROXYPHENYL)PROPANE WITH EPICHLOROHYDRIN AND A PHENYL NAPHTHYL AMINE.
References Cited (Backward Citations)
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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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |