US2618600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone oil lubricating composition
Assignee: Douglas Aircraft Co Inc
•
Filing: 1948-07-15
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Granted: 1952-11-18
•
Expires: 1968-07-15
Abstract
No abstract record available.
Inventors
- 👤 Douglas H Moreton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:29
CPC Classifications
C; C10; C10M; C10M3/00; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
THE NORMALLY LIQUID HOMOGENEOUS SILICONE OIL LUBRICATING COMPOSITION HAVING IMPROVED LUBRICATING AND FIRE-RESISTANCE PROPERTIES CONSISTING ESSENTIALLY OF LIQUID DIMETHYL SILICONE POLYMERS, MONO-ALKYL DIARYL PHOSPHATE IN WHICH THE ARYL GROUPS ARE MEMBERS OF THE GROUP CONSISTING OF PHENYL, CRESYL AND XYLYL AND THE ALKYL GROUP HAS FROM 4 TO 10 CARBON ATOMS, AND TRI-ALKYL PHOSPHATE IN WHICH THE ALKYL GROUPS HAVE FROM 4 TO 10 CARBON ATOMS, SAID SILICONE POLYMERS HAVING MANY DESIRABLE LUBRICATING PROPERTIES BUT BEING DEFICIENT IN EXTREME PRESSURE AND LOAD-CARRYING LUBRICATING PROPERTIES AND INCOMPATIBLE WITH SAID MONO-ALKYL DIARYL PHOSPHATE WITHOUT SAID TRIALKYL PHOSPHATE, SAID MONO-ALKYL DIARYL PHOSPHATE BEING PRESENT IN A PROPORTION SUFFICIENT TO IMPROVE SAID LUBRICATING PROPERTIES AND FIRE-RESISTANCE OF SAID COMPOSITION AND BEING IMCOMPATIBLE WITH SAID SILICONE POLYMERS WITHOUT SAID TRIALKYL PHOSPHATE, AND SAID TRIALKYL PHOSPHATE BEING PRESENT IN SUFFICIENT PROPORTION TO RENDER SAID SILICONE POLYMERS AND SAID MONO-ALKYL DIARYL PHOSPHATE COMPATIBLE IN THE COMPOSITION.
Claim 2
Dependent Claim
149 words
THE NORMALLY LIQUID HOMOGENEOUS SILICONE OIL LUBRICATING COMPOSITION HAVING IMPROVED LUBRICATING AND FIRE-RESISTANCE PROPERTIES CONSISTING ESSENTIALLY OF LIQUID DIMETHYL SILICONE POLYMERS, MONO-ALKYL DIARYL PHOSPHATE IN WHICH THE ARYL GROUPS ARE MEMBERS OF THE GROUP CONSISTING OF PHENYL, CRESYL AND XYLYL AND THE ALKYL GROUP HAS FROM 4 TO 10 CARBON ATOMS, AND TRI-ALKYL PHOSPHATE IN WHICH THE ALKYL GROUPS HAVE FROM 4 TO 10 CARBON ATOMS, SAID SILICONE POLYMERS HAVING MANY DESIRABLE LUBRICATING PROPERTIES BUT BEING DEFICIENT IN EXTREME PRESSURE AND LOAD-CARRYING LUBRICATING PROPERTIES AND INCOMPATIBLE WITH SAID MONO-ALKYL DIARYL PHOSPHATE WITHOUT SAID TRIALKYL PHOSPHATE, SAID MONO-ALKYL DIARYL PHOSPHATE BEING PRESENT IN A PROPORTION SUFFICIENT TO IMPROVE SAID LUBRICATING PROPERTIES AND FIRE-RESISTANCE OF SAID COMPOSITION AND BEING IMCOMPATIBLE WITH SAID SILICONE POLYMERS WITHOUT SAID TRIALKYL PHOSPHATE, AND SAID TRIALKYL PHOSPHATE BEING PRESENT IN SUFFICIENT PROPORTION TO RENDER SAID SILICONE POLYMERS AND SAID MONO-ALKYL DIARYL PHOSPHATE COMPATIBLE IN THE COMPOSITION.
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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) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |