Patent US2771422A successfully refreshed from Google Patents.
US2771422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymethylpolysiloxane thickened phenylmethyl silicone oil
Assignee: Standard Oil Co
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Filing: 1952-04-29
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Granted: 1956-11-20
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Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 George V Browning
- 👤 Cecil G Brannen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:28
CPC Classifications
C; C10; C10M; C10M7/00; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/043; C10M2229/044; C10M2229/05; C10M2229/051; C10N; C10N2020/00; C10N2020/01; C10N2050/00; C10N2050/08; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
THE METHOD OF PREPARING A HOMOGENEOUS THERMALLY STABLE ORGANO-SILICONE POLYMER GREASE CONSISTING ESSENTIALLY OF A THERMALLY STABLE ORGANO-SILICONE POLYMER HAVING A VISCOSITY IN THE LUBRICATING OIL RANGE OF FROM ABOUT 10 TO 600 CENTISTOKES AT 100* F. THICKENED TO GREASE CONSISTENCY WITH A GELLED POLYMETHYLPOLYSILOXANE, COMPRISING MIXING FROM ABOUT 40% TO 98% OF A LIQUID POLYMETHYLPOLYSILOXANE SUBSTANTIALLY FREE OF UNREACTED -OH GROUPS WITH FROM ABOUT 2% TO ABOUT 60% OF A LIQUID ORGANO-SILICONE POLYMER, OTHER THAN SAID POLYMETHYLPOLYSILOXANE, THERMALLY STABLE AT TEMPERATURES UP TO ABOUT 550* F. AND HAVING A VISCOSITY IN THE LUBRICATING OIL RANGE OF FROM ABOUT 10 TO ABOUT 600 CENTISTOKES AT 100* F., HEATING SAID MIXTURE TO A TEMPERATURE IN THE RANGE OF FROM ABOUT 400* F. TO ABOUT 550* F. FOR A PERIOD OF FROM ABOUT 1 HOUR TO ABOUT 72 HOURS TO FORM A GELLED MIXTURE, AND MILLING THE RESULTANT GELLED MIXTURE WITH A SUFFICIENT AND MILLING THE RESULTANT GELLED MIXTURE WITH A POLYMER HAVING A VISCOSTIY IN THE LUBRICATING OIL VISCOSITY RANGE OF FROM ABOUT 10 TO ABOUT 600 CENTISTOKES AT 100* F. TO FORM A HOMOGENEOUS GREASE CONTAINING FROM ABOUT 10% TO ABOUT 80% OF SAID GELLED MIXTURE.
Claim 2
Independent Claim
196 words
THE METHOD OF PREPARING A HOMOGENEOUS THERMALLY STABLE ORGANO-SILICONE POLYMER GREASE CONSISTING ESSENTIALLY OF A THERMALLY STABLE ORGANO-SILICONE POLYMER HAVING A VISCOSITY IN THE LUBRICATING OIL RANGE OF FROM ABOUT 10 TO 600 CENTISTOKES AT 100* F. THICKENED TO GREASE CONSISTENCY WITH A GELLED POLYMETHYLPOLYSILOXANE, COMPRISING MIXING FROM ABOUT 40% TO 98% OF A LIQUID POLYMETHYLPOLYSILOXANE SUBSTANTIALLY FREE OF UNREACTED -OH GROUPS WITH FROM ABOUT 2% TO ABOUT 60% OF A LIQUID ORGANO-SILICONE POLYMER, OTHER THAN SAID POLYMETHYLPOLYSILOXANE, THERMALLY STABLE AT TEMPERATURES UP TO ABOUT 550* F. AND HAVING A VISCOSITY IN THE LUBRICATING OIL RANGE OF FROM ABOUT 10 TO ABOUT 600 CENTISTOKES AT 100* F., HEATING SAID MIXTURE TO A TEMPERATURE IN THE RANGE OF FROM ABOUT 400* F. TO ABOUT 550* F. FOR A PERIOD OF FROM ABOUT 1 HOUR TO ABOUT 72 HOURS TO FORM A GELLED MIXTURE, AND MILLING THE RESULTANT GELLED MIXTURE WITH A SUFFICIENT AND MILLING THE RESULTANT GELLED MIXTURE WITH A POLYMER HAVING A VISCOSTIY IN THE LUBRICATING OIL VISCOSITY RANGE OF FROM ABOUT 10 TO ABOUT 600 CENTISTOKES AT 100* F. TO FORM A HOMOGENEOUS GREASE CONTAINING FROM ABOUT 10% TO ABOUT 80% OF SAID GELLED MIXTURE.
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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) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |