US2884411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a glucosamine
Assignee: Unilever Bestfoods North America
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Filing: 1954-07-29
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Granted: 1959-04-28
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Expires: 1974-07-29
Abstract
No abstract record available.
Inventors
- 👤 Heyns Kurt Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:10
CPC Classifications
C; C07; C07H; C07H5/00; C07H5/04; C07H5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR PREPARING A GLUCOSAMINE IN THE FROM OF A GLUCOSAMINE HYDROCHLORIDE WHICH COMPRISES MIXING FRUCTOSE AND A NITROGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF LIQUID AMMONIA, CONCENTRATED AQUEOUS AMMONIA, METHYL AMINE, BUTYL MAINE, BENZYLAMINE AND DIETHYLAMINE, AUTOGENOUSLY HEATING SAID MIXTURE AT LEAST REFLUX TEMPERATURE TO CONVERT SAID FRUCTOSE TO A GLUCOSAMINE, ADDING HYDROCHLORIC ACID TO SAID HEATED MIXTURE TO STABILIZE SAID GLUCOSAMINE AS THE HYDROCHLORIDE THEREOF, TREATING SAID ACIDIFIED HEATED MIXTURE WITH AN ACID CATION EXCHANGER, AND RECOVERING THE GLUCOSAMINE AS THE HYDROCHLORIDE THEREOF FROM SAID ACID CATION EXCHANGER.
Claim 2
Dependent Claim
92 words
A PROCESS FOR PREPARING A GLUCOSAMINE IN THE FROM OF A GLUCOSAMINE HYDROCHLORIDE WHICH COMPRISES MIXING FRUCTOSE AND A NITROGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF LIQUID AMMONIA, CONCENTRATED AQUEOUS AMMONIA, METHYL AMINE, BUTYL MAINE, BENZYLAMINE AND DIETHYLAMINE, AUTOGENOUSLY HEATING SAID MIXTURE AT LEAST REFLUX TEMPERATURE TO CONVERT SAID FRUCTOSE TO A GLUCOSAMINE, ADDING HYDROCHLORIC ACID TO SAID HEATED MIXTURE TO STABILIZE SAID GLUCOSAMINE AS THE HYDROCHLORIDE THEREOF, TREATING SAID ACIDIFIED HEATED MIXTURE WITH AN ACID CATION EXCHANGER, AND RECOVERING THE GLUCOSAMINE AS THE HYDROCHLORIDE THEREOF FROM SAID ACID CATION EXCHANGER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |