US2549378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of amino acids
Assignee: Rohm and Haas Co
•
Filing: 1948-03-16
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Granted: 1951-04-17
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Expires: 1968-03-16
Abstract
No abstract record available.
Inventors
- 👤 Kunin Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:27
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/64; C07C; C07C227/00; C07C227/38; C07C227/40; C07C229/00; C07C229/02; C07C229/04; C07C229/26; C07C279/00; C07C279/04; C07C279/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS OF SEPARATING A BASIC AMINO ACID FROM A MIXTURE OF AMINO ACIDS WHICH COMPRISES PASSING A SOLUTION OF THE MIXTURE THROUGH A BED OF CARBOXYLIC TYPE ION-EXCHANGE RESIN CONTAINING CARBOXYLIC ACID GROUPS AND CARBOXYLIC SALT GROUPS IN A RATIO THAT HAS BEEN ADJUSTED SO THAT THE PH OF THE AMINO ACID SOLUTION IN CONTACT WITH THE RESIN IS MAINTAINED BELOW THE ISOELECTRIC POINT OF THE AMINO ACID TO BE ADSORBED AND ABOVE THE ISOELECTRIC POINT OF THE AMINO ACID NOT TO BE ADSORBED, AND THEREAFTER ELUTING THE AMINO ACID THAT HAS BEEN ADSORBED BY SAID RESIN.
Claim 2
Dependent Claim
98 words
A PROCESS OF SEPARATING A BASIC AMINO ACID FROM A MIXTURE OF AMINO ACIDS WHICH COMPRISES PASSING A SOLUTION OF THE MIXTURE THROUGH A BED OF CARBOXYLIC TYPE ION-EXCHANGE RESIN CONTAINING CARBOXYLIC ACID GROUPS AND CARBOXYLIC SALT GROUPS IN A RATIO THAT HAS BEEN ADJUSTED SO THAT THE PH OF THE AMINO ACID SOLUTION IN CONTACT WITH THE RESIN IS MAINTAINED BELOW THE ISOELECTRIC POINT OF THE AMINO ACID TO BE ADSORBED AND ABOVE THE ISOELECTRIC POINT OF THE AMINO ACID NOT TO BE ADSORBED, AND THEREAFTER ELUTING THE AMINO ACID THAT HAS BEEN ADSORBED BY SAID RESIN.
References Cited (Backward Citations)
FR805092A
Cited
US2375164A
Cited
US2375165A
Cited
US2386926A
Cited
US2387824A
Cited
US2429666A
Cited
US2457117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |