Patent US3646090A successfully refreshed from Google Patents.
US3646090A
Expired / Lapsed
US
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Process for preparing linear chlorine terminated siloxane compounds
Assignee: Union Carbide Corp
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Filing: 1969-05-29
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Granted: 1972-02-29
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Expires: 1989-05-29
Abstract
Abstract A PROCESS FOR PREPARING LOW MOLECULAR WEIGHT LINEAR CHLORINE TERMINATED SILOXANE POLYMERS BY REACTING A CYCLOTRI-, CYCLOTETRA- OR CYCLOPENTASILOXANE WITH THIONYL CHLORIDE IN THE PRESENCE OF A CATALYST SUCH AS PHOSPHINE COMPOUND, A PHOSPHINE OXIDE OR AN AMINE N-OXIDE, THE SAID SILOXANE POLYMERS FIND UTILITY AS CROSS-LINKING AGENTS FOR ROOM TEMPERATURE VULCANIZABLE RESINS AND RUBBER SYSTEMS.
Inventors
- 👤 Everett W Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:56
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/50; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0876; C08K5/51; C08K5/53; C08L; C08L101/00
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |