Patent US2500247A successfully refreshed from Google Patents.
US2500247A
Expired / Lapsed
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Synthetic lubricants
Assignee: ExxonMobil Oil Corp
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Filing: 1948-12-11
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Granted: 1950-03-14
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Expires: 1968-12-11
Abstract
No abstract record available.
Inventors
- 👤 William E Garwood
- 👤 Francis M Seger
- 👤 Alexander N Sachanen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:44
CPC Classifications
C; C10; C10M; C10M3/00; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/10; C10M2207/14; C10M2207/142; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2223/00; C10M2223/12; C10M2223/121; C10M2225/00; C10M2225/02; C10M2225/04; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF PREPARATION OF A VISCOUS OIL, WHICH COMPRISES: CONDENSING, AT A TEMPERATURE BETWEEN ABOUT 500*F. AND ABOUT 750*F. FOR A PERIOD OF TIME SUFFICIENT TO EFFECT CONDENSATION, ONE MOLAR PROPORTION OF A STRAIGHT CHAIN, ALPHA MONO-OLEFIN HAVING FROM SIX TO FOURTEEN CARBON ATOMS, FROM ABOUT 0.1 TO ABOUT 1.0 MOLAR PROPORTION OF A CONJUGATED HYDROCARBON AND FROM ABOUT 0.01 TO ABOUT 10 PER CENT, BY WEIGHT OF TOTAL OLEFINS, OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A PHOSPHORUS SULFIDE, ELEMENTAL PHOSPHORUS WITH ELEMENTAL SULFUR, AND MIXTURES THEREOF; SAID CONJUGATED HYDROCARBON BEING CHARACTERIZED BY AT LEAST ONE
Claim 2
Independent Claim
100 words
THE METHOD OF PREPARATION OF A VISCOUS OIL, WHICH COMPRISES: CONDENSING, AT A TEMPERATURE BETWEEN ABOUT 500*F. AND ABOUT 750*F. FOR A PERIOD OF TIME SUFFICIENT TO EFFECT CONDENSATION, ONE MOLAR PROPORTION OF A STRAIGHT CHAIN, ALPHA MONO-OLEFIN HAVING FROM SIX TO FOURTEEN CARBON ATOMS, FROM ABOUT 0.1 TO ABOUT 1.0 MOLAR PROPORTION OF A CONJUGATED HYDROCARBON AND FROM ABOUT 0.01 TO ABOUT 10 PER CENT, BY WEIGHT OF TOTAL OLEFINS, OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A PHOSPHORUS SULFIDE, ELEMENTAL PHOSPHORUS WITH ELEMENTAL SULFUR, AND MIXTURES THEREOF; SAID CONJUGATED HYDROCARBON BEING CHARACTERIZED BY AT LEAST ONE
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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |