US3553242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 1,3-disilyl-1,3,2,4-diazadisiletidines
Assignee: Monsanto Co
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Filing: 1968-04-26
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Granted: 1971-01-05
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Expires: 1988-04-26
Abstract
Abstract A PROCESS FOR MAKING COMPOUNDS OF FORMULA 1,3-BIS((R-)A-SI(-X)(3-A)-),2,4-DI(R-)B,2,4-DI(X-)(2-B)- CYCLODISILAZANE BY REATING A CYCLIC SILIZANE OF THE FORMULA (R2SINH)C WITH A HALOSILANE OF THE FORMULA RASIX4-A OR BY HEATING A COMPOUND OF THE FORMULA X3-ARASINHSIRAX3-A IN THE PRESENCE OF A HYDROCHLORIC ACID BINDING AGENT. THESE COMPOUNDS FIND UTILITY AS HIGH TEMPERATURE RESISTANT LIQUIDS AND INTERMEDIATE IN THE PREPARATION OF POLYMERIC PRODUCTS.
Inventors
- 👤 Walter Fink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:40
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/54; C07; C07F; C07F7/00; C07F7/02; C07F7/21
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |