Patent US2664202A successfully refreshed from Google Patents.
US2664202A
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Lubricant and method of making same
Assignee: Standard Oil Co
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Filing: 1949-12-22
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Granted: 1953-12-29
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Expires: 1969-12-22
Abstract
No abstract record available.
Inventors
- 👤 John D Bartleson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:16
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/123; C07; C07F; C07F9/00; C07F9/02; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/04; C10M2223/00; C10M2223/10; C10M2223/12; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A METHOD OF IMPROVING THE COLOR OF LUBRICANTS AND LUBRICANT ADDITIVES WHICH ARE REACTION PRODUCTS OF 5 TO 60% BY WEIGHT OF A PHOSPHORUS SULFIDE AND 95 TO 40% OF A MIXTURE OF ONE PART BY WEIGHT OF AN OXYGEN-CONTAINING ORGANIC COMPOUND REACTIVE WITH PHOSPHORUS SULFIDE AND SELECTED FROM THE GROUP CONSISTING OF THOSE COMPOUNDS CONTAINING HYDROXY, CARBONYL, ETHER AND CARBOXY RADICALS, AND HAVING A BOILING POINT OF AT LEAST 225*F. WITH 1 TO 10 PARTS OF A POLY-OLEFIN CAPABLE OF IMPROVING THE VISCOSITY INDEX CHARACTERISTIC OF A LUBRICATING OIL, REACTED TOGETHER AT A TEMPERATURE IN THE RANGE OF 225* TO 500* F., WHICH METHOD COMPRISES TREATING SUCH REACTION PRODUCTS WITH AN AMOUNT OF ADSORBENT DECOLORIZING AGENT IN THE RANGE OF 1 TO 10% BY WEIGHT OF THE REACTION MIXTURE AND SUFFICIENT TO IMPROVE THE COLOR OF THE REACTION PRODUCT, SAID DECOLORIZING AGENT HAVING A WATER CONTENT IN THE RANGE OF 0 TO 6% BY WEIGHT, AND RECOVERING IMPROVED REACTION PRODUCT.
Claim 2
Independent Claim
161 words
A METHOD OF IMPROVING THE COLOR OF LUBRICANTS AND LUBRICANT ADDITIVES WHICH ARE REACTION PRODUCTS OF 5 TO 60% BY WEIGHT OF A PHOSPHORUS SULFIDE AND 95 TO 40% OF A MIXTURE OF ONE PART BY WEIGHT OF AN OXYGEN-CONTAINING ORGANIC COMPOUND REACTIVE WITH PHOSPHORUS SULFIDE AND SELECTED FROM THE GROUP CONSISTING OF THOSE COMPOUNDS CONTAINING HYDROXY, CARBONYL, ETHER AND CARBOXY RADICALS, AND HAVING A BOILING POINT OF AT LEAST 225*F. WITH 1 TO 10 PARTS OF A POLY-OLEFIN CAPABLE OF IMPROVING THE VISCOSITY INDEX CHARACTERISTIC OF A LUBRICATING OIL, REACTED TOGETHER AT A TEMPERATURE IN THE RANGE OF 225* TO 500* F., WHICH METHOD COMPRISES TREATING SUCH REACTION PRODUCTS WITH AN AMOUNT OF ADSORBENT DECOLORIZING AGENT IN THE RANGE OF 1 TO 10% BY WEIGHT OF THE REACTION MIXTURE AND SUFFICIENT TO IMPROVE THE COLOR OF THE REACTION PRODUCT, SAID DECOLORIZING AGENT HAVING A WATER CONTENT IN THE RANGE OF 0 TO 6% BY WEIGHT, AND RECOVERING IMPROVED REACTION 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 |