Patent US2566097A successfully refreshed from Google Patents.
US2566097A
Expired / Lapsed
US
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2-(3:4-dihydroxyphenyl) morpholine and its preparation
Assignee: ILSE LIEBRECHT BORN BOEHRINGER
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Filing: 1949-12-21
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Granted: 1951-08-28
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Expires: 1969-12-21
Abstract
No abstract record available.
Inventors
- 👤 Thoma Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:07
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/28; C07D265/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A PROCESS FOR THE PREPARATION OF 2-(3:4DIHYDROXYPHENYL) MORPHOLINE IN WHICH A SOLUTION OF SALT OF 1-(3:4-DIHYDROXYPEHNYL)-1-HYDROXY-2-ETHANOLAMINOETHANE IS ALLOWED TO STAND WHEREUPON THE MORPHOLINE BASE IS SET FREE AND SEPARATED IN USUAL MANNER.
Claim 2
Dependent Claim
32 words
A PROCESS FOR THE PREPARATION OF 2-(3:4DIHYDROXYPHENYL) MORPHOLINE IN WHICH A SOLUTION OF SALT OF 1-(3:4-DIHYDROXYPEHNYL)-1-HYDROXY-2-ETHANOLAMINOETHANE IS ALLOWED TO STAND WHEREUPON THE MORPHOLINE BASE IS SET FREE AND SEPARATED IN USUAL MANNER.
References Cited (Backward Citations)
FR713382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |