US4044593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatograph
Assignee: Shimadzu Seisakusho Ltd
•
Filing: 1974-02-13
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Granted: 1977-08-30
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Expires: 1994-02-13
Abstract
Abstract A chromatograph having removable modular analysis units fitting into a chamber within the chromatograph housing, each unit including a column, sample introduction portion and detector. Each modular unit includes a block of thermally conductive material which encloses substantial portions of the sample introduction means and detector and is provided with an exposed surface adapted to contact heating means contained in the chromatograph housing.
Inventors
- 👤 Tatsuro Haruki
- 👤 Yoshiro Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:57
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/30; G01N2030/3007; G01N2030/3084; G01N30/88; G01N2030/8881
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A chromatograph comprising a housing having walls defining a column chamber; a plurality of blocks constituting at least a portion of said housing walls so that said blocks are selectively detachable from said housing wall portion, at least one of said blocks carrying thereon a sample introducing portion, a column and a detector so as to form an analysis unit and including an inner block of thermally conductive material enclosing substantial portions of said sample introducing portion and said detector means; means for supplying a carrier fluid to said sample introducing portion; and means for heating said inner block, said heating means contained in said housing and having an exposed surface, said exposed surface adapted to contact a corrsponding exposed surface of said inner block of thermally conductive material whereby heat is transferred from said heating means to said inner block when said blocks are attached to said housing.
Claim 2
Dependent Claim
149 words
A chromatograph comprising a housing having walls defining a column chamber; a plurality of blocks constituting at least a portion of said housing walls so that said blocks are selectively detachable from said housing wall portion, at least one of said blocks carrying thereon a sample introducing portion, a column and a detector so as to form an analysis unit and including an inner block of thermally conductive material enclosing substantial portions of said sample introducing portion and said detector means; means for supplying a carrier fluid to said sample introducing portion; and means for heating said inner block, said heating means contained in said housing and having an exposed surface, said exposed surface adapted to contact a corrsponding exposed surface of said inner block of thermally conductive material whereby heat is transferred from said heating means to said inner block when said blocks are attached to said housing.
Claim 3
Dependent Claim
36 words
The chromatograph of claim 1, wherein one of said housing walls has an opening formed therein and said plurality of blocks are complementarily fitted into said opening so that said blocks can be individually removed therefrom.
Claim 4
Dependent Claim
25 words
The chromatograph of claim 1, wherein said one wall and another of said walls adjacent to said one wall are movable relative to said housing.
Claim 5
Dependent Claim
26 words
The chromatopgraph of claim 1, wherein another of said walls adjacent to said wall portion wherein said blocks are fitted is movable relative to said housing.
Claim 6
Dependent Claim
39 words
The chromatograph of claim 1, wherein the outer ends of said sample introducing portion and detector are provided at one and the same side of said block so that access thereto can easily be made from outside said housing.
Claim 7
Dependent Claim
18 words
The chromatograph of claim 1 wherein there are a plurality of analysis units having different kinds of columns.
Claim 8
Dependent Claim
18 words
The chromatograph of claim 1, wherein there are a plurality of analysis units having different kinds of detectors.
Claim 9
Dependent Claim
29 words
The chromatograph of claim 1, wherein at least another of said blocks is a dummy block of the same shape and dimension as the block of said analysis unit.
Claim 10
Dependent Claim
14 words
The chromatograph of claim 8, wherein said analysis units include different kinds of detectors.
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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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |