Patent US2681890A successfully refreshed from Google Patents.
US2681890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of oxidized oil and pcl3
Assignee: Standard Oil Co
•
Filing: 1951-03-06
•
Granted: 1954-06-22
•
Expires: 1971-03-06
Abstract
No abstract record available.
Inventors
- 👤 Frazier David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:43
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; C10M159/00; C10M159/12; C10M159/123; C10M2203/00; C10M2203/10; C10M2203/1006; C10N; C10N2030/00; C10N2030/06; C10N2040/00; C10N2040/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD OF PREPARING A SOLUBLE OIL WHICH COMPRISES REACTING PHOSPHORUS TRICHLORIDE WITH A HIGHLY REFINED PETROLEUM OIL OXIDIZED TO HAVE A SAPONIFICATION NUMBER BETWEEN ABOUT 20 AND 80 AND A NEUTRALIZATION NUMBER BETWEEN ABOUT 9 AND 25, AND THEN TREATING THE REACTION PRODUCT WITH AN AQUEOUS SOLUTION OF A STRONG INORGANIC BASE IN AN AMOUNT SUFFICIENT TO NEUTRALIZE THE REACTION PRODUCT BUT NOT IN AN EXCESS SUFFICIENT TO RAISE THE PH OF THE NEUTRALIZED PRODUCT ABOVE ABOUT 10.
Claim 2
Independent Claim
79 words
A METHOD OF PREPARING A SOLUBLE OIL WHICH COMPRISES REACTING PHOSPHORUS TRICHLORIDE WITH A HIGHLY REFINED PETROLEUM OIL OXIDIZED TO HAVE A SAPONIFICATION NUMBER BETWEEN ABOUT 20 AND 80 AND A NEUTRALIZATION NUMBER BETWEEN ABOUT 9 AND 25, AND THEN TREATING THE REACTION PRODUCT WITH AN AQUEOUS SOLUTION OF A STRONG INORGANIC BASE IN AN AMOUNT SUFFICIENT TO NEUTRALIZE THE REACTION PRODUCT BUT NOT IN AN EXCESS SUFFICIENT TO RAISE THE PH OF THE NEUTRALIZED PRODUCT ABOVE ABOUT 10.
References Cited (Backward Citations)
US2252674A
Cited
US2355994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |