US2689846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpene-phosphorous pentasulfidesulfur lubricating oil additive
Assignee: Wyeth Holdings LLC
•
Filing: 1949-12-14
•
Granted: 1954-09-21
•
Expires: 1969-12-14
Abstract
No abstract record available.
Inventors
- 👤 Lindley C Beegle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:02
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/04; C10; C10M; C10M159/00; C10M159/12; C10M159/123; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/12; C10M2225/00; C10M2225/04; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD OF PREPARING A HYDROCARBON LUBRICATING OIL ANTIOXIDANT WHICH COMPRISES SIMULTANEOUSLY REACTING TOGETHER A BICYCLIC TERPENE, PHOSPHOROUS PENTASULFIDE, AND ELEMENTAL SULFUR AT A TEMPERATURE RANGE OF FROM ABOUT 115* C. TO ABOUT 130* C. FOR A PERIOD OF TIME NOT SUBSTANTIALLY EXCEEDING FOUR HOURS, THE REACTANTS BEING EMPLOYED IN THE PROPORTION OF AT LEAST ABOUT 4 MOLS OF THE BICYCLIC TERPENE AND FROM ABOUT 0.5 TO ABOUT 3 MOLS OF SULFUR FOR EACH MOL OF PHOSPHOROUS PENTASULFIDE.
Claim 2
Independent Claim
78 words
A METHOD OF PREPARING A HYDROCARBON LUBRICATING OIL ANTIOXIDANT WHICH COMPRISES SIMULTANEOUSLY REACTING TOGETHER A BICYCLIC TERPENE, PHOSPHOROUS PENTASULFIDE, AND ELEMENTAL SULFUR AT A TEMPERATURE RANGE OF FROM ABOUT 115* C. TO ABOUT 130* C. FOR A PERIOD OF TIME NOT SUBSTANTIALLY EXCEEDING FOUR HOURS, THE REACTANTS BEING EMPLOYED IN THE PROPORTION OF AT LEAST ABOUT 4 MOLS OF THE BICYCLIC TERPENE AND FROM ABOUT 0.5 TO ABOUT 3 MOLS OF SULFUR FOR EACH MOL OF PHOSPHOROUS PENTASULFIDE.
References Cited (Backward Citations)
US2316087A
Cited
US2486188A
Cited
US2379453A
Cited
US2455668A
Cited
US2413648A
Cited
US2580430A
Cited
US2515222A
Cited
US2571737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |