Patent US2664436A successfully refreshed from Google Patents.
US2664436A
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Lubricating oil composition of high viscosity and method for preparing same
Assignee: Standard Oil Development Co
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Filing: 1950-12-06
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Granted: 1953-12-29
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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
2026-11-09 12:05
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M107/00; C10M107/02; C10M133/00; C10M133/02; C10M133/38; C10M133/40; C10M2205/00; C10M2205/02; C10M2205/0206; C10M2205/028; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10N; C10N2040/00; C10N2040/135; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A METHOD FOR INCREASING THE VISCOSITY OF AN OLEFINIC LUBRICATING OIL POLYMER HAVING LUBRICATING OIL CHARACTERISTICS WHICH COMPRISES OXIDIZING THE POLYMER AT A TEMPERATURE IN THE RANGE FROM 300* TO 600* F. IN THE PRESENCE OF AN OXIDATION PROMOTER CONSISTING OF AN AMOUNT NO LESS THAN 0.1% BY WEIGHT OF QUINOLINE TO FORM AN OXIDIZED PRODUCT HAVING A SUBSTANTIALLY INCREASED VISCOSITY AND A LOW NEUTRALIZATION VALUE AND RECOVERING SAID PRODUCT.
Claim 2
Independent Claim
70 words
A METHOD FOR INCREASING THE VISCOSITY OF AN OLEFINIC LUBRICATING OIL POLYMER HAVING LUBRICATING OIL CHARACTERISTICS WHICH COMPRISES OXIDIZING THE POLYMER AT A TEMPERATURE IN THE RANGE FROM 300* TO 600* F. IN THE PRESENCE OF AN OXIDATION PROMOTER CONSISTING OF AN AMOUNT NO LESS THAN 0.1% BY WEIGHT OF QUINOLINE TO FORM AN OXIDIZED PRODUCT HAVING A SUBSTANTIALLY INCREASED VISCOSITY AND A LOW NEUTRALIZATION VALUE AND RECOVERING SAID PRODUCT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |