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US3570673A
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Separation column for liquid chromatography
Assignee: Schott AG
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Filing: 1969-09-04
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Granted: 1971-03-16
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Expires: 1989-09-04
Abstract
Abstract A separation column for liquid chromatography is constructed by taking a bundle of parallel inorganic chemical fibers produced from glass which serves as a liquid stationary phase and surrounding it by a sleeve of chemically resistant material which is shrunk on said bundles of fibers. After a heat treatment a phase separation takes place and then the soluble phase is eliminated by a leaching and washing procedure so that a porous glass remains.
Inventors
- 👤 Hubert Dutz
- 👤 Hans-Otto Mulfinger
- 👤 Johann Friedrich Pfrommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:29
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/28; B01J20/28014; B01J20/28023; B01J20/281; B01J20/286; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3234; B01J20/324; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3257; B01J20/3291; B01J20/3293; G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6034; G01N30/6043; B01J2220/00; B01J2220/50; B01J2220/54; B01J2220/80; B01J2220/84
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
30 words
Separation column for use in liquid-chromatography comprising a bundle of parallel fibers consisting of porous glass serving as a liquid stationary phase surrounded by a sleeve of chemically resistant material.
Claim 2
Dependent Claim
50 words
Separation column for use in liquid-chromatography in which dissolved substances are separated from a solution, said separation column comprising a bundle of parallel inorganic fibers serving as a liquid stationary phase surrounded by a sleeve of chemically resistant material, said fibers being surface modified by means of a trimethyl-chloro-silane coating.
Claim 3
Dependent Claim
50 words
Separation column for use in liquid-chromatography in which dissolved substances are separated from a solution, said separation column comprising a bundle of parallel inorganic fibers serving as a liquid stationary phase surrounded by a sleeve of chemically resistant material, said fibers being surface modified by means of a carbon coating.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |