Patent US2737526A successfully refreshed from Google Patents.
US2737526A
Expired / Lapsed
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Process for the manufacture of hydroxy-phenylserines
Assignee: Hoechst AG
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Filing: 1952-04-29
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Granted: 1956-03-06
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Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Ehrhart Gustav
- 👤 Ott Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:08
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/02; C07C229/34; C07C229/36; C07C215/00; C07C215/46; C07C215/48; C07C215/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR THE MANUFACTURE OF HYDROXYPHENYLSERINES WHICH COMPRISES REACTING BENZYLOXY-BENZALDEHYDES WITH GLYCOCOLL IN THE PRESENCE OF AN ALKALI HYDROXIDE AND SUBSEQUENTLY SPLITTING OFF THE BENZYL RADICALS BY TREATING THE REACTION PRODUCTS WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF CATALYTICALLY ACTIVATED HYDROGEN AND HYDROBROMIC ACID.
Claim 2
Dependent Claim
47 words
A PROCESS FOR THE MANUFACTURE OF HYDROXYPHENYLSERINES WHICH COMPRISES REACTING BENZYLOXY-BENZALDEHYDES WITH GLYCOCOLL IN THE PRESENCE OF AN ALKALI HYDROXIDE AND SUBSEQUENTLY SPLITTING OFF THE BENZYL RADICALS BY TREATING THE REACTION PRODUCTS WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF CATALYTICALLY ACTIVATED HYDROGEN AND HYDROBROMIC ACID.
References Cited (Backward Citations)
DE632424C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |