US3661857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric compositions
Assignee: Monsanto Co
•
Filing: 1970-04-13
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Granted: 1972-05-09
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Expires: 1990-04-13
Abstract
Abstract A POLYMER COMPRISING A REACTIVE HYDROGEN CONTAINING MATERIAL SUCH AS POLYURETHANE, COPOLYMERIZED WITH SUBSTITUTED EPOXY ETHANE POLYPHOSPHONATE HAVING THE FORMULA 2-X,2-Y,3,3-BIS((R-O-)2-P(=O)-)OXIRANE WHEREIN R IS HYDROGEN OR AN ORGANIC RADICAL AND X AND Y ARE HEREINAFTER DEFINED.
Inventors
- 👤 Al F Kerst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:28
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/836; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5373
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |