US3143514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic polymerization of silazanes
Assignee: Dow Silicones Corp
•
Filing: 1960-06-15
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Granted: 1964-08-04
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Expires: 1980-06-15
Abstract
No abstract record available.
Inventors
- 👤 William A Boyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:08
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C08G77/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
25 words
A PROCESS FOR POLYMERIZING THE REACTION PRODUCT OF A MEMBER OF THE CLASS CONSISTING OF AMMONIA AND PRIMARY AMINES WITH A HALOSILANE HAVING THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |