US2643261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus-containing lubricating oil additives
Assignee: Standard Oil Development Co
•
Filing: 1948-10-01
•
Granted: 1953-06-23
•
Expires: 1968-10-01
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Matuszak
- 👤 Charles A Weisel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:32
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/6574; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/047; C10N; C10N2030/00; C10N2030/12; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
AS A NEW COMPOSITION OF MATTER, A PHOSPHORUS-CONTAINING ESTER PREPARED BY REACTING TOGETHER PENTAERYTHRITOL MONO-OLEATE AND A C1 TO C30 MONOHYDROXY ALIPHATIC ALCOHOL AT TEMPERATURES NOT ABOVE REFLUX WITH A PHOSPHORUS-CONTAINING MATERIAL SELECTED FROM THE GROUP WHICH CONSISTS OF POCI3, PCI5, AND PSCI3, IN THE PRESENCE OF PYRIDINE AND A SOLVENT, SAID ESTER BEING STRIPPED OF WATER AND OF SAID PYRIDINE AND SOLVENT AFTER REACTION IS SUBSTANTIALLY COMPLETE.
Claim 2
Dependent Claim
68 words
AS A NEW COMPOSITION OF MATTER, A PHOSPHORUS-CONTAINING ESTER PREPARED BY REACTING TOGETHER PENTAERYTHRITOL MONO-OLEATE AND A C1 TO C30 MONOHYDROXY ALIPHATIC ALCOHOL AT TEMPERATURES NOT ABOVE REFLUX WITH A PHOSPHORUS-CONTAINING MATERIAL SELECTED FROM THE GROUP WHICH CONSISTS OF POCI3, PCI5, AND PSCI3, IN THE PRESENCE OF PYRIDINE AND A SOLVENT, SAID ESTER BEING STRIPPED OF WATER AND OF SAID PYRIDINE AND SOLVENT AFTER REACTION IS SUBSTANTIALLY COMPLETE.
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) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |