Patent US4000070A successfully refreshed from Google Patents.
US4000070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for protecting a liquid chromatography column
Assignee: Resonac Holdings Corp
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Filing: 1976-03-24
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Granted: 1976-12-28
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Expires: 1996-03-24
Abstract
Abstract An improved apparatus for protection of a liquid chromatography column is proposed. Under environmental changes in pressure and temperature, a liquid and a gas in a non-expandable container communicated with the chromatography column change their relative volume, so that the environmental changes are not transmitted to the column. To prevent the gas from entering into the column, a conduit connecting the column and the container enters into interior of the container.
Inventors
- 👤 Sadao Sumikama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:47
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/52; B; B01; B01D; B01D15/00; B01D15/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
97 words
An apparatus for protecting a liquid chromatography column against environmental conditions comprising: a liquid chromatography column having a packing filled therein; a fluid tight container; a conduit for communicating said column and said container, connected to both said column and said container, and one end of the conduit terminating inside said container at almost the central position of the geometrical shape of said container; a liquid occupying the majority of the inner space of said container, and completely filling both said column and conduit, and; a gas filled in the remaining non-liquid occupied space of the container.
Claim 2
Independent Claim
97 words
An apparatus for protecting a liquid chromatography column against environmental conditions comprising: a liquid chromatography column having a packing filled therein; a fluid tight container; a conduit for communicating said column and said container, connected to both said column and said container, and one end of the conduit terminating inside said container at almost the central position of the geometrical shape of said container; a liquid occupying the majority of the inner space of said container, and completely filling both said column and conduit, and; a gas filled in the remaining non-liquid occupied space of the container.
Claim 3
Dependent Claim
29 words
An apparatus according to claim 1, wherein said gas is either air or a gas which evaporates from said liquid, or a mixture of air and the evaporated gas.
Claim 4
Dependent Claim
13 words
An apparatus according to claim 1, wherein said gas is an inert gas.
Claim 5
Independent Claim
111 words
An apparatus for protecting a liquid chromatography column against environmental conditions comprising: a liquid chromatography column having a packing filled therein; a fluid tight container which is made of material essentially exhibiting neither expansion nor contraction under said environmental conditions; a conduit for communicating said column and said container, connected to both said column and said container, and one end of said conduit terminating inside said container at almost the central position of geometrical shape of said container; a liquid occupying the majority of the inner space of said container, and completely filling both said column and conduit, and; a gas filled in the remaining non-liquid occupied space of the container.
Claim 6
Independent Claim
111 words
An apparatus for protecting a liquid chromatography column against environmental conditions comprising: a liquid chromatography column having a packing filled therein; a fluid tight container which is made of material essentially exhibiting neither expansion nor contraction under said environmental conditions; a conduit for communicating said column and said container, connected to both said column and said container, and one end of said conduit terminating inside said container at almost the central position of geometrical shape of said container; a liquid occupying the majority of the inner space of said container, and completely filling both said column and conduit, and; a gas filled in the remaining non-liquid occupied space of the container.
Claim 7
Dependent Claim
29 words
An apparatus according to claim 4, wherein said gas is either air or a gas which evaporates from said liquid, or a mixture of air and the evaporated gas.
Claim 8
Dependent Claim
13 words
An apparatus according to claim 4, wherein said gas is an inert gas.
Claim 9
Independent Claim
124 words
An apparatus for protecting a liquid chromatography column against environmental conditions comprising: a liquid chromatography column having a packing filled therein; a fluid tight container; a first conduit for communicating said column and said container, connected to both said column and said container, and one end of the conduit terminating inside said container at almost the central position of the geometrical shape of said container; a liquid occupying the majority of the inner space of said container, and completely filling both said column and conduit, a second conduit connected to said container, entering said container at one end thereof and being closable at a part thereof located out of said container, and; a gas filled in the remaining non-liquid occupied space of the container.
Claim 10
Independent Claim
124 words
An apparatus for protecting a liquid chromatography column against environmental conditions comprising: a liquid chromatography column having a packing filled therein; a fluid tight container; a first conduit for communicating said column and said container, connected to both said column and said container, and one end of the conduit terminating inside said container at almost the central position of the geometrical shape of said container; a liquid occupying the majority of the inner space of said container, and completely filling both said column and conduit, a second conduit connected to said container, entering said container at one end thereof and being closable at a part thereof located out of said container, and; a gas filled in the remaining non-liquid occupied space of the container.
Claim 11
Dependent Claim
22 words
An apparatus according to claim 7, wherein said gas possesses low solubility in said liquid and is introduced through said second conduit.
Claim 12
Dependent Claim
25 words
An apparatus according to claim 8, wherein said fluid tight container is made of material essentially exhibiting neither expansion nor contraction under said environmental conditions.
Claim 13
Dependent Claim
13 words
An apparatus according to claim 8, wherein said gas is an inert gas.
Claim 14
Dependent Claim
25 words
An apparatus according to claim 10, wherein said fluid tight container is made of material essentially exhibiting neither expansion nor contraction under said environmental conditions.
References Cited (Backward Citations)
FR1213694A
Cited
US3537585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |