US2603602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Addition agents and mineral oil lubricant compositions containing the same
Assignee: Gulf Oil Corp
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Filing: 1949-01-27
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Granted: 1952-07-15
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Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 Herschel G Smith
- 👤 Troy L Cantrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:04
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2223/00; C10M2223/12; C10M2225/00; C10M2225/04; C10N; C10N2040/00; C10N2040/135; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE PROCESS OF PREPARING AN IMPROVEMENT AGENT FOR MINERAL OIL LUBRICANTS WHICH COMPRISES HEATING AN ESSENTIALLY PARAFFINIC BASE LUBRICATING OIL WITH ANHYDROUS ALUMINUM CHLORIDE AT A TEMPERATURE OF FROM 150* TO 300* F., REMOVING ALUMINUM CHLORIDE FROM THE REACTION PRODUCTS, AND REACTING SAID PRODUCT AND FROM 10 TO 75 PER CENT BY WEIGHT OF AN ALKYL PHOSPHATE HAVING AT LEAST 5 CARBON ATOMS IN THE ALKYL GROUP WITH PHOSPHORUS PENTASULFIDE AT AN ELEVATED TEMPERATURE NOT BELOW 300* F. AND NOT IN EXCESS OF THE MINIMUM CRACKING TEMPERATURE OF SAID PRODUCT TO INCORPORATE PHOSPHORUS AND SULFUR THEREIN.
Claim 2
Dependent Claim
96 words
THE PROCESS OF PREPARING AN IMPROVEMENT AGENT FOR MINERAL OIL LUBRICANTS WHICH COMPRISES HEATING AN ESSENTIALLY PARAFFINIC BASE LUBRICATING OIL WITH ANHYDROUS ALUMINUM CHLORIDE AT A TEMPERATURE OF FROM 150* TO 300* F., REMOVING ALUMINUM CHLORIDE FROM THE REACTION PRODUCTS, AND REACTING SAID PRODUCT AND FROM 10 TO 75 PER CENT BY WEIGHT OF AN ALKYL PHOSPHATE HAVING AT LEAST 5 CARBON ATOMS IN THE ALKYL GROUP WITH PHOSPHORUS PENTASULFIDE AT AN ELEVATED TEMPERATURE NOT BELOW 300* F. AND NOT IN EXCESS OF THE MINIMUM CRACKING TEMPERATURE OF SAID PRODUCT TO INCORPORATE PHOSPHORUS AND SULFUR THEREIN.
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) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |