US5242586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Column protection system for liquid chromatography system
Assignee: Biotage AB
•
Filing: 1990-12-17
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Granted: 1993-09-07
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Expires: 2010-12-17
Abstract
Abstract A liquid chromatography column protection system having a system pump, a bubble trap, and a column includes detectors for monitoring certain system conditions such as the presence of air or overpressurization and valves and controlling means for shutting down system operation when the conditions are detected.
Inventors
- 👤 Thomas C. Ransohoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:15
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/52; G01N15/00; G01N2015/0007; G01N2015/0011; G01N21/00; G01N21/01; G01N21/03; G01N21/05; G01N2021/054; G01N2030/522; G01N30/88; G01N2030/8804; G01N2201/00; G01N2201/12; G01N2201/121; G01N2201/1211; G01N2201/1212
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
A liquid chromatography column protection system comprising a system pump for supplying liquid via a supply line, a chromatography column for receiving the liquid, a bubble trap intermediate the pump and column for removing air from the system, a bubble detector for detecting the presence of air in the supply ahead of the column, a pressure detector for detecting overpressurization of the liquid supply to the column, inlet and outlet valves for the column, and control means for monitoring the bubble detector and the pressure detector, for arresting system operation by shutting down the system pump and shutting the inlet and outlet valves when undesired conditions are detected, and for restoring normal system operation after shutdown.
Claim 2
Dependent Claim
116 words
A liquid chromatography column protection system comprising a system pump for supplying liquid via a supply line, a chromatography column for receiving the liquid, a bubble trap intermediate the pump and column for removing air from the system, a bubble detector for detecting the presence of air in the supply ahead of the column, a pressure detector for detecting overpressurization of the liquid supply to the column, inlet and outlet valves for the column, and control means for monitoring the bubble detector and the pressure detector, for arresting system operation by shutting down the system pump and shutting the inlet and outlet valves when undesired conditions are detected, and for restoring normal system operation after shutdown.
Claim 3
Dependent Claim
42 words
A liquid chromatography column protection system as defined in claim 1 which further includes a pH or conductivity detector for shutting down a sanitizing equilibrating operation when system conditions reach a predetermined end point of sanitization or equilibrium of the chromatography column.
Claim 4
Dependent Claim
30 words
A liquid chromatography column protection system as defined in claim 1 which further includes a temperature detector for shutting down a system operation when system conditions reach a predetermined temperature.
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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) | 1996-09-06 | 1997-03-08 | 1997-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-06 | 2001-03-08 | 2001-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-06 | 2005-03-08 | 2005-09-07 | $7700.00 | Window Closed / Lapsed |