US4587014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid chromatography column assembly
Assignee: PerkinElmer Instruments LLC
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Filing: 1984-05-07
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Granted: 1986-05-06
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Expires: 2004-05-07
Abstract
Abstract A liquid chromatography column assembly includes a separation column having stationary phase retaining frits is positioned within a housing adapted to accept conventional column termination fittings. The assembly includes a sealed cylindrical cavity to ensure radial distribution of the incoming fluid across the cross-section of the column.
Inventors
- 👤 William G. America
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:25
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6004; G01N30/50; G01N30/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A liquid chromatography column assembly comprising, in combination: a liquid chromatography separation column; a housing having said column positioned therein; retaining means affixed to said housing for retaining a column injection fitting; said retaining means including a portion extending beyond said housing, said portion having an internally threaded opening, said column extending beyond said portion of said fitting retaining means; a semi-rigid gasket disposed between the end of said column and a column injection fitting, said gasket having an inside diameter at least equal to the inside diameter of said column; a porous frit disposed adjacent the end of said column through which frit liquid must pass prior to entry into said column; and said housing, said frit, said semi-rigid gasket and said retaining means being shaped so that in use a sealed substantially cylindrical cavity is formed between the fitting to which said retaining means couples and said frit thereby permitting substantially uniform injection of liquid into said column through said frit.
Claim 2
Dependent Claim
163 words
A liquid chromatography column assembly comprising, in combination: a liquid chromatography separation column; a housing having said column positioned therein; retaining means affixed to said housing for retaining a column injection fitting; said retaining means including a portion extending beyond said housing, said portion having an internally threaded opening, said column extending beyond said portion of said fitting retaining means; a semi-rigid gasket disposed between the end of said column and a column injection fitting, said gasket having an inside diameter at least equal to the inside diameter of said column; a porous frit disposed adjacent the end of said column through which frit liquid must pass prior to entry into said column; and said housing, said frit, said semi-rigid gasket and said retaining means being shaped so that in use a sealed substantially cylindrical cavity is formed between the fitting to which said retaining means couples and said frit thereby permitting substantially uniform injection of liquid into said column through said frit.
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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |