US3239489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly-urea-silazanes and process of preparation
Assignee: Monsanto Co
•
Filing: 1962-10-15
•
Granted: 1966-03-08
•
Expires: 1982-10-15
Abstract
No abstract record available.
Inventors
- 👤 Fink Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:03
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/10; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3893; C08G77/00; C08G77/60; Y; Y10; Y10S; Y10S528/00; Y10S528/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A PROCESS FOR PREPARING POLY-UREA-SILAZANES COMPRISING REACTING A POLYIMINO SILAZANNE SELECTED FROM SILAZANES OF THE FORMULAS
Claim 2
Dependent Claim
16 words
A PROCESS FOR PREPARING POLY-UREA-SILAZANES COMPRISING REACTING A POLYIMINO SILAZANNE SELECTED FROM SILAZANES OF THE FORMULAS
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |