US3759872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
E accelerators process for the production of epoxide polyadducts with phosphine oxid
Assignee: Ciba Geigy Marienberg GmbH
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Filing: 1972-02-01
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Granted: 1973-09-18
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Expires: 1992-02-01
Abstract
Abstract PROCESS FOR THE PRODUCTION OF EPOXIDE POLYADDUCTS BY THE REACTION OF EPOXIDE COMPOUDS WITH COMPOUNDS GIVING POLYADDUCTS OF EPOXIDE COMPOUNDS, WHEREBY THE REACTION IS CARRIED OUT IN THE PRESENCE OF A PHOSPHINE OXIDE AS A REACTION ACCELERATOR IN AN AMOUNT OF 0.1 TO 10 PARTS BY WEIGHT TO 100 PARTS BY WEIGHT OF THE EXPOXIDE COMPOUND.
Inventors
- 👤 J Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:56
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/688
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |