Patent US2603603A successfully refreshed from Google Patents.
US2603603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agents and mineral oil lubricant compositions containing the same
Assignee: Gulf Oil Corp
•
Filing: 1946-12-27
•
Granted: 1952-07-15
•
Expires: 1966-12-27
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 22:52
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/123; C10M2223/00; C10M2223/12; C10M2225/00; C10M2225/04; C10M2225/041; C10N; C10N2040/00; C10N2040/135; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE PROCESS OF PREPARING AN IMPROVED AGENT FOR MINERAL OIL LUBRICATING WHICH COMPRISES HEATING A MIXTURE CONSISTING OF AN ESSENTIALLY PARAFFINIC BASE LUBRICATING OIL AND ANHYDROUS ALUMINUM CHLORIDE AT A TEMPERATURE OF FROM 150* TO 300* F., REMOVING ALUMINUM CHLORIDE FROM THE REACTION PRODUCT, AND REACTING SAID PRODUCT WITH PHOSPHORUS PENTASULFIDE AT A TEMPERATURE OF FROM 450* F. TO A MAXIMUM TEMPERATURE BELOW THE MINIMUM CRACKING TEMPERATURE OF SAID PRODUCT TO INCORPORATE PHOSPHORUS AND SULFUR THEREIN.
Claim 2
Dependent Claim
76 words
THE PROCESS OF PREPARING AN IMPROVED AGENT FOR MINERAL OIL LUBRICATING WHICH COMPRISES HEATING A MIXTURE CONSISTING OF AN ESSENTIALLY PARAFFINIC BASE LUBRICATING OIL AND ANHYDROUS ALUMINUM CHLORIDE AT A TEMPERATURE OF FROM 150* TO 300* F., REMOVING ALUMINUM CHLORIDE FROM THE REACTION PRODUCT, AND REACTING SAID PRODUCT WITH PHOSPHORUS PENTASULFIDE AT A TEMPERATURE OF FROM 450* F. TO A MAXIMUM TEMPERATURE BELOW 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 |