Patent US2638448A successfully refreshed from Google Patents.
US2638448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral oil
Assignee: ExxonMobil Oil Corp
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Filing: 1950-02-14
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Granted: 1953-05-12
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Expires: 1970-02-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Wehrle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:21
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/123; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/047; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A MINERAL LUBRICATING OIL CONTAINING AN AMOUNT SUFFICIENT TO IMPROVE THE OXIDATION CHARACTERISTICS THEREOF OF THE REACTION PRODUCT OBTAINED BY REACTING A MONOHYDRIC REACTANT SELECTED FROM THE GROUP CONSISTING OF ALKANETHIOLS HAVING BETWEEN ABOUT 6 AND ABOUT 24 CARBON ATOMS PER MOLECULE AND ALIPHATIC ALCOHOLS HAVING BETWEEN ABOUT 6 AND ABOUT 24 CARBON ATOMS PER MOLECULE AND A PHOSPHORUS HALIDE, IN A MOLAR PROPORTION VARYING BETWEEN ABOUT 0.5:1, RESPECTIVELY AND ABOUT 2.5:1, RESPECTIVELY, AT A TEMPERATURE OF BETWEEN ABOUT 0* C. AND ABOUT 150* C., AND FOR BETWEEN ABOUT 3 HOURS AND ABOUT 10 HOURS, TO PRODUCE AN INTERMEDIATE PRODUCT, AND REACTING A THIOPHENETHIOL WITH SAID INTERMEDIATE PRODUCT, IN A MOLAR PROPORTION OF SAID THIOPHENETHIOL TO SAID PHOSPHORUS HALIDE USED TO PRODUCE SAID INTERMEDIATE PRODUCT VARYING BETWEEN ABOUT 2.5:1, RESPECTIVELY, AND ABOUT 0.5:1, RESPECTIVELY, AT A TEMPERATURE OF BETWEEN ABOUT 0* C. AND ABOUT 150* C., AND FOR BETWEEN ABOUT 3 HOURS AND ABOUT 10 HOURS; THE SUM OF THE NUMBER OF MOLES OF SAID MONOHYDRIC REACTANT AND OF SAID THIOPHENETHIOL SO REACTED WITH EACH MOLE OF SAID PHOSPHORUS HALIDE BEING THREE MOLES.
Claim 2
Dependent Claim
183 words
A MINERAL LUBRICATING OIL CONTAINING AN AMOUNT SUFFICIENT TO IMPROVE THE OXIDATION CHARACTERISTICS THEREOF OF THE REACTION PRODUCT OBTAINED BY REACTING A MONOHYDRIC REACTANT SELECTED FROM THE GROUP CONSISTING OF ALKANETHIOLS HAVING BETWEEN ABOUT 6 AND ABOUT 24 CARBON ATOMS PER MOLECULE AND ALIPHATIC ALCOHOLS HAVING BETWEEN ABOUT 6 AND ABOUT 24 CARBON ATOMS PER MOLECULE AND A PHOSPHORUS HALIDE, IN A MOLAR PROPORTION VARYING BETWEEN ABOUT 0.5:1, RESPECTIVELY AND ABOUT 2.5:1, RESPECTIVELY, AT A TEMPERATURE OF BETWEEN ABOUT 0* C. AND ABOUT 150* C., AND FOR BETWEEN ABOUT 3 HOURS AND ABOUT 10 HOURS, TO PRODUCE AN INTERMEDIATE PRODUCT, AND REACTING A THIOPHENETHIOL WITH SAID INTERMEDIATE PRODUCT, IN A MOLAR PROPORTION OF SAID THIOPHENETHIOL TO SAID PHOSPHORUS HALIDE USED TO PRODUCE SAID INTERMEDIATE PRODUCT VARYING BETWEEN ABOUT 2.5:1, RESPECTIVELY, AND ABOUT 0.5:1, RESPECTIVELY, AT A TEMPERATURE OF BETWEEN ABOUT 0* C. AND ABOUT 150* C., AND FOR BETWEEN ABOUT 3 HOURS AND ABOUT 10 HOURS; THE SUM OF THE NUMBER OF MOLES OF SAID MONOHYDRIC REACTANT AND OF SAID THIOPHENETHIOL SO REACTED WITH EACH MOLE OF SAID PHOSPHORUS HALIDE BEING THREE MOLES.
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) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |