US2732346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfurized hydrocarbon lubricant additive
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-05-29
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Granted: 1956-01-24
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Expires: 1972-05-29
Abstract
No abstract record available.
Inventors
- 👤 Robert H Jones
- 👤 Elmer B Cyphers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:17
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/541; C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2493; C10M; C10M135/00; C10M135/02; C10M135/04; F01; F01D; F01D25/00; F01D25/30; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/08; C10M2219/082; C10M2219/086; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10N; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/08; C10N2040/135; C10N2040/20; C10N2040/22; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A MULTI-FUNCTIONAL LUBRICANT ADDITIVE OBTAINED BY REACTING A SUBSTANTIALLY NON-OLEFINIC HYDROCARBON FEED STOCK, HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 200 AND CONTAINING AT LEAST ABOUT 20% BY WEIGHT OF ALKYL AROMATICS, WITH ELEMENTAL SULFUR IN AN AMOUNT IN THE RANGE OF ABOUT 7 TO 30% BY WEIGHT BASED ON THE TOTAL REACTION MIXTURE, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE IN THE RANGE OF ABOUT 400* TO 500*F. FOR A TIME SUFFICIENT TO FORM A PRODUCT CONTAINING IN THE RANGE OF ABOUT 20 TO 30% BY WEIGHT OF THE ORIGINALLY ADDED SULFUR IN CHEMICALLY BOUND FORM.
Claim 2
Dependent Claim
121 words
A SUBSTANTIALLY NON-CORROSIVE MOTOR LUBRICANT COMPOSITION COMPRISING A MINERAL LUBRICATING OIL CONTAINING A DETERGENT AMOUNT OF THE PRODUCT OBTAINED BY REACTING A SUBSTANTIALLY NON-OLEFINIC PETROLEUM BASE STOCK COMPRISING ALKYL AROMATICS AND HAVING A VISCOSITY (SAYBOLT) AT 210* F. ABOVE 75 SECONDS, A MOLECULAR WEIGHT ABOVE 200, AND AN A. P. I. GRAVITY BELOW 30* WITH ELEMENTAL SULFUR IN AN AMOUNT IN THE RANGE OF ABOUT 7 TO 30% BY WEIGHT BASED ON THE TOTAL REACTION MIXTURE, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE IN THE RANGE OF ABOUT 400* TO 500* F. FOR A TIME SUFFICIENT TO FORM A PRODUCT CONTAINING IN CHEMICALLY BOUND FORM IN THE RANGE OF ABOUT 20 TO 30% BY WEIGHT OF THE ORIGINALLY ADDED SULFUR.
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) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |