US3431222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature resistant polymeric cyclosilazanes
Assignee: Monsanto Co
•
Filing: 1967-06-22
•
Granted: 1969-03-04
•
Expires: 1987-06-22
Abstract
No abstract record available.
Inventors
- 👤 Walter Fink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:53
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3207707A
Cited
US3228895A
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FR1425306A
Cited
US3297592A
Cited
US3172874A
Cited
US3311571A
Cited
US3354098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |