US3645919A
Expired / Lapsed
US
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Copolymers from phosphine oxide anhydrides
Assignee: Monsanto Co
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Filing: 1970-10-20
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Granted: 1972-02-29
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Expires: 1990-10-20
Abstract
Abstract POLYMERS PREPARED BY COPOLYMERIZING A REACTIVE HYDROGEN-CONTAINING MATERIAL FROM THE GROUP POLYHYDRIC COMPOUNDS AND POLYAMINE COMPOUNDS WITH A FULL ANHYDRIDE OF AN ORGANOALKYLIDENE PHOSPHINE OXIDE HAVING THE FORMULA: (R)N-P(=O)-(C(-X)(-Y)-P(=O)(-OH)2)(3-N) WHEREIN R, X, Y AND N ARE DEFINED IN THE SPECIFICATION.
Inventors
- 👤 Al F Kerst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:23
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/04; Y; Y10; Y10S; Y10S260/00; Y10S260/24
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |