US4830716B1
Expired / Lapsed
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Preparation of pharmaceutical grade amino acid chelates
Assignee: Albion Laboratories Inc
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Filing: 1986-07-03
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Granted: 1999-12-07
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Expires: 2006-07-03
Abstract
Abstract Pharmaceutical grade amino acid chelates, free of interfering anions, are made by reacting an amino acid ligand with a metal member selected from the group consisting of elemental metals, metal oxides, metal hydroxides and metal carbonates in an aqueous environment wherein the ligand to metal mole ratio is at least 2:l and recovering the amino acid chelate from said aqueous environment by means of spray or drum drying. The reaction may be carried out in the presence of non-interfering anions such as anions from citric acid, ascorbic acid, acetic acid, carbonic acid and ammonium and alkali metal saltes thereof.
Inventors
- 👤 Harvey H Ashmead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:18
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/41
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-12-06 | 2003-06-07 | 2003-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-06 | 2007-06-07 | 2007-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-06 | 2011-06-07 | 2011-12-07 | $7700.00 | Window Closed / Lapsed |