Patent US3712890A successfully refreshed from Google Patents.
US3712890A
Expired / Lapsed
US
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Process for making 2-aryloxymethyl morpholines
Assignee: Imperial Chemical Industries Ltd
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Filing: 1970-06-08
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Granted: 1973-01-23
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Expires: 1990-06-08
Abstract
Abstract A PROCESS FOR THE MANUFACTURE OF 2 - ARYLOXYMETHYL MORPHOLINE DERIVATIVES, KNOWN OT POSSESS USEFUL CENTRAL NERVOUS DEPRESSANT ACTIVITY, BY THE CYCLISATION OF THE CORRESPONDING 1 - ARYLOXY - 3 - B - SUBSTITUTED ETHYLEMINO-2PROPANOL DERIVATIVES IN WHICH THE B-SUBSTITUENT IS A DISPLACEABLE RADICAL. THIS PROCESS AVOIDS THE USE OF HAZARDOUS COMPLEX METAL HYDRIDES EMPLOYED IN THE PRIOR ART PROCESS.
Inventors
- 👤 S Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:01
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/28; C07D265/30
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |