US3576783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic compositions containing phosphine oxide anhydrides
Assignee: Monsanto Co
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Filing: 1969-06-11
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Granted: 1971-04-27
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Expires: 1989-06-11
Abstract
Abstract THIS INVENTION COVERS ORGANIC COMPOSITIONS CONTAINING, FOR EXAMPLE, POLYURETHANE AND A PHOSPHINE OXIDE ANHYDRIDE SUCH AS TRIS(ALKYLIDENE PHOSPHONYL) PHOSPHINE OXIDE ANHYDRIDE HAVING THE FORMULA 1,3,5,7-TETRA(O=),6,8,10-TRI(X-),6,8,10-TRI(Y-)- 2,4,9-TRIOXA-1,3,5,7-TETRAPHOSPHAADAMANTANE
Inventors
- 👤 Al F Kerst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:22
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |