US3776933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing amidosilanes
Assignee: Dow Silicones Corp
•
Filing: 1972-09-29
•
Granted: 1973-12-04
•
Expires: 1992-09-29
Abstract
Abstract MIXING METAL SALTS OF ORGANIC AMIDES WITH ORGANOHALOSILANES IN AN INERT ORGANIC SOLVENT IS A USEFUL METHOD FOR PREPARING AMIDOSILANES OF THE FORMULA R"XSI(N(R)C(O)R'')4-X WHERE R IS METHYL, ETHYL, PROPYL OR PHENYL, R'' IS METHYL, ETHYL OR PHENYL, R" IS A HYDROCARBON RADICAL AND X IS 1,2 OR 3. THE BY-PRODUCED METAL HALIDE IS EPARATED FROM THE AMIDOSILANE SOLUTION WHICH CAN BE USED TO MAKE SILICONE ELASTOMERS AND RESINS. THE ORGANIC SOLVENT CAN BE SEPARATED FROM THE AMIDOSILANE FOR USE IN SILICONE ELASTOMERS AND RESINS WHERE SOLVENTS ARE NOT DESIRED.
Inventors
- 👤 L Toporcer
- 👤 I Crossan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:05
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/10; C08; C08L; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |