US2616916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of olefin lubricant having a high viscosity
Assignee: Standard Oil Development Co
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Filing: 1950-12-06
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Granted: 1952-11-04
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Expires: 1970-12-06
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:13
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/064; C10N; C10N2040/00; C10N2040/135; C10N2050/00; C10N2050/10; C10N2060/00; C10N2060/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A METHOD FOR INCREASING THE VISCOSITY OF AN ING OIL CHARACTERISTICS WHICH COMPRISES OXIDIZING OLEFINIC LUBRICATING OIL POLYMER HAVING LUBRICATTHE POLYMER AT A TEMPERATURE IN THE RANGE FROM 300* TO 600* F. IN THE PRESENCE OF A PROMOTIONAL AMOUNT NO LESS THAN 0.1% BY WEIGHT OF DIPHENYLTHIOUREA TO FORM AN OXIDIZED PRODUCT HAVING AN INCREASED VISCOSITY AND A LOW NEUTRALIZATION VALUE AND RECOVERY SAID PRODUCT.
Claim 2
Independent Claim
65 words
A METHOD FOR INCREASING THE VISCOSITY OF AN ING OIL CHARACTERISTICS WHICH COMPRISES OXIDIZING OLEFINIC LUBRICATING OIL POLYMER HAVING LUBRICATTHE POLYMER AT A TEMPERATURE IN THE RANGE FROM 300* TO 600* F. IN THE PRESENCE OF A PROMOTIONAL AMOUNT NO LESS THAN 0.1% BY WEIGHT OF DIPHENYLTHIOUREA TO FORM AN OXIDIZED PRODUCT HAVING AN INCREASED VISCOSITY AND A LOW NEUTRALIZATION VALUE AND RECOVERY SAID PRODUCT.
References Cited (Backward Citations)
US2209464A
Cited
US2500162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |