Patent US2945809A successfully refreshed from Google Patents.
US2945809A
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Thickened lubricant and process for preparing the same
Assignee: Standard Oil Co
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Filing: 1954-08-05
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Granted: 1960-07-19
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Expires: 1974-08-05
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Milberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:11
CPC Classifications
C; C10; C10M; C10M5/00; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/157; C01B33/158; C01B33/1585; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/10; C10M2201/102; C10M2205/00; C10M2205/02; C10M2205/026; C10M2211/00; C10M2211/08; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/067; C10M2215/22; C10M2215/223; C10M2215/224; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10N; C10N2040/00; C10N2040/02; C10N2040/20; C10N2040/22; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A THICKENED LUBRICANT OF GOOD TEMPERATURE SUSCEPTIBILITY PROPERTIES, CONSISTING ESSENTIALLY OF (1) A MINERAL LUBRICATING OIL OF LUBRICATING VISCOSITY AS THE MAJOR COMPONENT AND (2) AS THE MINOR COMPONENT A SILICA AEROGEL THICKENING AGENT IN AN AMOUNT SUFFICIENT TO IMPART A GREASE CONSISTENCY TO THE OIL, SAID SILICA AEROGEL HAVING BEEN PREPARED FROM A HYDROGEL CONTAINING FROM 3 TO ABOUT 8% SIO2 BY CONVERTING THE HYDROGEL INTO AN ALCOGEL, VOLATILIZING LIQUID CONTAINED IN THE ALCOGEL TO FORM AN AEROGEL BY HEATING AT A TEMPERATURE AND PRESSURE ABOVE THE CRITICAL TEMPERATURE AND PRESSURE OF ALCOHOL IN THE ALCOGEL TO CONVERT THE ALCOHOL INTO A GAS WITHOUT DESTROYING THE GEL STRUCTURE, DEVOLATILIZING THE AEROGEL BY HEATING AT A TEMPERATURE OF FROM ABOUT 1200* TO ABOUT 1800*F. AND THEN REDUCING THE DEVOLATILIZED AEROGEL TO A SECONDARY AGGLOMERATE PARTICLE SIZE OF FROM ONE TO SIX MICRONS, SAID SILICA AEROGEL BEING CHARACTERIZED BY THE FOLLOWING PROPERTIES:
Claim 2
Dependent Claim
151 words
A THICKENED LUBRICANT OF GOOD TEMPERATURE SUSCEPTIBILITY PROPERTIES, CONSISTING ESSENTIALLY OF (1) A MINERAL LUBRICATING OIL OF LUBRICATING VISCOSITY AS THE MAJOR COMPONENT AND (2) AS THE MINOR COMPONENT A SILICA AEROGEL THICKENING AGENT IN AN AMOUNT SUFFICIENT TO IMPART A GREASE CONSISTENCY TO THE OIL, SAID SILICA AEROGEL HAVING BEEN PREPARED FROM A HYDROGEL CONTAINING FROM 3 TO ABOUT 8% SIO2 BY CONVERTING THE HYDROGEL INTO AN ALCOGEL, VOLATILIZING LIQUID CONTAINED IN THE ALCOGEL TO FORM AN AEROGEL BY HEATING AT A TEMPERATURE AND PRESSURE ABOVE THE CRITICAL TEMPERATURE AND PRESSURE OF ALCOHOL IN THE ALCOGEL TO CONVERT THE ALCOHOL INTO A GAS WITHOUT DESTROYING THE GEL STRUCTURE, DEVOLATILIZING THE AEROGEL BY HEATING AT A TEMPERATURE OF FROM ABOUT 1200* TO ABOUT 1800*F. AND THEN REDUCING THE DEVOLATILIZED AEROGEL TO A SECONDARY AGGLOMERATE PARTICLE SIZE OF FROM ONE TO SIX MICRONS, SAID SILICA AEROGEL BEING CHARACTERIZED BY THE FOLLOWING PROPERTIES:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |