Patent US3661847A successfully refreshed from Google Patents.
US3661847A
Expired / Lapsed
US
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Carborane-siloxane polymers
Assignee: Dow Silicones Corp
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Filing: 1969-05-01
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Granted: 1972-05-09
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Expires: 1989-05-01
Abstract
Abstract SILOXANE POLYMERS HAVING HALOALKYL SUBSTITUENTS AND A CARBORANE LINKAGE IN THE POLYMER BACKBONE PROVIDE HEAT STABLE FLUIDS, RESINS AND ELASTOMERS. A SPECIFIC POLYMER HO-(SI(-CH3)(-(CH2)2-CF3)-CB10H10C-(SI(-CH3)(-(CH2)2-CF3)- O)2-SI(-CH3)(-(CH2)2-CF3))X-H CAN BE COMPOUNDED WITH SILICIA TO FORM AN ELASTOMER WHICH IS STABLE AT TEMPERATURES OF 600*F. AND GREATER.
Inventors
- 👤 Dwain R Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:08
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |