Patent US3580941A successfully refreshed from Google Patents.
US3580941A
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US
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Aminocyclotetrasilozanes
Assignee: Midland Silicones Ltd
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Filing: 1970-02-19
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Granted: 1971-05-25
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Expires: 1990-02-19
Abstract
Abstract NOVEL COMPOSITIONS OF MATTER AND PROCESSES FOR PREPARING BICYCLO- AND AMINOCYCLOTETRASILAZANES. THE AMINOCYCLOTETRASILAZANES ARE USED TO FORM BICYCLOTETRASILAZANES BY HEATING AT TEMPERATURES ABOVE 210*C. UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS.
Inventors
- 👤 Christopher A Pearce
- 👤 Norman C Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:16
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C08G77/62; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/10; C07F7/21; C08G77/48; C08G77/54; C08L; C08L83/00; C08L83/04; C08G77/42; C08G77/452
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |