US3761444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equilibration of epoxy substituted siloxanes in presence of water andsilanol
Assignee: Union Carbide Corp
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Filing: 1969-08-18
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Granted: 1973-09-25
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Expires: 1989-08-18
Abstract
Abstract THIS INVENTION IS AN IMPROVEMENT IN THE MANUFACTURE OF EPOXY SUBSTITUTED SILOXANES. LOWER MOLECULAR WEIGHT EPOXY SUBSTITUTED SILOXANES ARE EQUILIBRATED WITH OTHER SILOXANES TO PRODUCE SILOXANE COPOLYMERS CONTAINING THE SUBSTITUENTS OF BOTH THE EPOXY SILOXANE AND THE OTHER SILOXANES. THIS IS ACCOMPLISHED WITH A BASIC EQUILIBRATION CATALYST AND IN THE PRESENCE OF SMALL QUANTITIES OF WATER AND SILANOL.
Inventors
- 👤 F Mendicino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:27
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/06; C08G77/10
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |