US3132154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of ascorbic acid esters
Assignee: Individual
•
Filing: 1958-01-09
•
Granted: 1964-05-05
•
Expires: 1978-01-09
Abstract
No abstract record available.
Inventors
- 👤 Meyer-Doring Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:55
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A PROCESS FOR THE PREPARATION OF AN ESTER OF AN AMINO ACID SELECTED FROM THE GROUP CONSISTING OF GLYCINE, ALANINE, LEUCINE, ISOLEUCINE, TYROSINE, CYSTINE, GLUTAMINIC ACID, CYSTEINE, HOMOCYSTEINE, GLUTHTHIONE, METHIONINE AND ETHIONINE WITH ASCORBIC ACID WHICH COMPRISES HEATING UNDER EXCLUSION OF OXYGEN AN ENDIOL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ASCORBIC ACID, ITS ALKALI METAL SALTS AND ITS ALKALINE EARTH METAL SALTS WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF GLYCINE, ALANINE, LEUCINE, ISOLEUCINE, TYROSINE, CYSTINE, GLUTAMINIC ACID, CYSTEINE, HOMOCYSTEINE, GLUTHATHIONE, METHIONINE, ETHIONINE AND THEIR HYDROCLORIDES IN A WATERFREE AND INDIFFERENT LIQUID MEDIUM SELECTED FROM THE GROUP CONSISTING OF ABSOLUTE ALCOHOL, ACETONE, ETHYL ETHER AND PETROLEUM ETHER AT A TEMPERATURE BETWEEN 30 AND 130*C. IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, THIONYL CHLORINE AND BORON TRIFLUORIDE AND RECOVERING THE REACTION PRODUCT FROM THE REACTION MIXTURE IN SOLID FORM.
Claim 2
Dependent Claim
147 words
A PROCESS FOR THE PREPARATION OF AN ESTER OF AN AMINO ACID SELECTED FROM THE GROUP CONSISTING OF GLYCINE, ALANINE, LEUCINE, ISOLEUCINE, TYROSINE, CYSTINE, GLUTAMINIC ACID, CYSTEINE, HOMOCYSTEINE, GLUTHTHIONE, METHIONINE AND ETHIONINE WITH ASCORBIC ACID WHICH COMPRISES HEATING UNDER EXCLUSION OF OXYGEN AN ENDIOL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ASCORBIC ACID, ITS ALKALI METAL SALTS AND ITS ALKALINE EARTH METAL SALTS WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF GLYCINE, ALANINE, LEUCINE, ISOLEUCINE, TYROSINE, CYSTINE, GLUTAMINIC ACID, CYSTEINE, HOMOCYSTEINE, GLUTHATHIONE, METHIONINE, ETHIONINE AND THEIR HYDROCLORIDES IN A WATERFREE AND INDIFFERENT LIQUID MEDIUM SELECTED FROM THE GROUP CONSISTING OF ABSOLUTE ALCOHOL, ACETONE, ETHYL ETHER AND PETROLEUM ETHER AT A TEMPERATURE BETWEEN 30 AND 130*C. IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, THIONYL CHLORINE AND BORON TRIFLUORIDE AND RECOVERING THE REACTION PRODUCT FROM THE REACTION MIXTURE IN SOLID FORM.
References Cited (Backward Citations)
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Cited
US2350435A
Cited
US2419230A
Cited
US2539483A
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US2585580A
Cited
GB752547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |