US3582475A
Expired / Lapsed
US
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Method and apparatus for the introduction of samples into chromatographic separating systems
Assignee: Individual
•
Filing: 1967-08-02
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Granted: 1971-06-01
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Expires: 1987-08-02
Abstract
Abstract THE SOLUTES OF A SAMPLE TO BE SEPARATED CHROMATOGRAPHICALLY ARE FIRST PLATED ONTO AN ELECTRODE. THIS ELECTRODE IS THEN MAINTAINED IN THE INLET OF A CHROMATOGRAPHIC SYSTEM WHERE BY REVERSAL OF THE CURRENT THE SAMPLE IS RETURNED TO SOLUTION. BY CONTROLLING THE SIZE OF THE ELECTRODE AND THE TIME TAKEN FOR THE SAMPLE TO RETURN TO SOLUTION, THE PLATE HEIGHT CONTRIBUTION OF THE INLET IS LIMITED. A PRELIMINARY PARTIAL SEPARATION OF THE SAMPLE BY ELECTROLYTIC MEANS IS ALSO PROVIDED FOR.
Inventors
- 👤 Victor Pretorius
- 👤 Hans Helmut Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:02
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01D15/26; B01D15/38; B01D15/3861; B01D15/3885; B01D11/00; B01D11/02; B01D11/04; B01D53/00; B01D53/14; B01D53/18; G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/26; G01N30/28; G01N30/34; G01N30/38; G01N30/50; G01N30/56; G01N30/62; G01N30/64; G01N30/84; G01N2030/387; G01N2030/626; G01N2030/645; G01N30/14
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |