US3707587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of organic phosphorus compounds
Assignee: Bayer AG
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Filing: 1971-03-16
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Granted: 1972-12-26
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Expires: 1991-03-16
Abstract
Abstract THE INVENTION RELATES TO AN IMPROVED PROCESS FOR THE PREPARATION OF ORGANIC PHOSPHORUS COMPOUNDS HAVING FREE HYDROXY GROUPS AND WHICH ARE USEFUL FOR THE PRODUCTION OF FLAME RESISTANT POLYURETHANE RESINS. PRODUCTION OF ORGANIC PHOSPHORUS COMPOUNDS BY REACTING SPIROCYCLIC COMPOUNDS WITH CARBONYL C OMPOUNDS AND ALKANOLAMINES AND THE UTILITY THEREOF IN THE PRODUCTION OF FLAME-RESISTANT POLYURETHANE RESINS.
Inventors
- 👤 Reinhard Schliebs
- 👤 Konrad Uhlig
- 👤 Gunter Oertel
- 👤 Hans-Joachim Diehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:52
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/3889; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C07F9/547; C07F9/6564; C07F9/6571; C07F9/6581; C07F9/6584
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |