US3346486A
Expired / Lapsed
US
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Apparatus and method for introduction of amino acid samples into a chromatography column
Assignee: Technicon Corp
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Filing: 1964-04-08
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Granted: 1967-10-10
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Expires: 1984-04-08
Abstract
No abstract record available.
Inventors
- 👤 George D Winter
- 👤 George N Catravas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:16
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/18; Y; Y10; Y10S; Y10S210/00; Y10S210/918
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A METHOD FOR THE CHROMATOGRAPHY ANALYSIS OF AN AMINO ACID SAMPLE BY APPARATUS HAVING A CHROMATOGRAPHY COLUMN CONTAINING AN ION EXCHANGE RESIN THROUGH WHICH A BUFFER LIQUID IS PUMPED FOR FORMING THE CHROMATOGRAM AND FOR THE STRIPPING OPERATION, SAID METHOD COMPRISING: INCORPORATING THE SAMPLE IN A LIQUID HAVING A HIGHER DENSITY THAN SAID BUFFER LIQUID, FLOWING THE BUFFER LIQUID INTO THE COLUMN, INTERRUPTING THE FLOW OF SAID BUFER INTO THE COLUMN, AND INTRODUCING A QUANTITY OF SAID SAMPLE-CONTAINING LIQUID INTO THE COLUMN ABOVE THE RESIN WHEREBY SAID SAMPLE-CONTAINING LIQUID FLOWS DOWNWARDLY THROUGH THE BUFFER LIQUID AND IS THEREBY LAYERED ON THE TOP SURFACE OF THE RESIN DISPLACING AN EQUAL VOLUME OF THE BUFFER LIQUID.
References Cited (Backward Citations)
US2769454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |