US3728845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for stripping the components of a mixed sample from a trap
Assignee: Shimadzu Corp
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Filing: 1970-09-14
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Granted: 1973-04-24
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Expires: 1990-09-14
Abstract
Abstract Method and apparatus for taking out the components of a mixed sample from a trap having a stationary phase therein where the sample components have been separately fixed at different positions. The whole effective length of the trap is simultaneously heated, and a ''''stripping'''' fluid is passed through the trap kept at the temperature so that the sample components are separately and successively elute.
Inventors
- 👤 T Haruki
- 👤 M Itaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:01
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; G01N1/405; H; H01; H01J; H01J49/00; H01J49/02; H01J49/025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
19 words
The method of claim 1, wherein said pressure difference providing step comprises flowing a stripping fluid through said trap.
Claim 2
Dependent Claim
43 words
The method of claim 1, wherein said trap is heated so that the whole cross-sectional area of said trap perpendicular to the axis thereof is maintained at a substantially uniform temperature while providing a pressure difference between the opposite ends of said trap.
Claim 3
Independent Claim
99 words
An apparatus for stripping the components of a mixed sample from a trap connected to chromatographic column, said trap having a stationary phase therein where the sample components have been separately fixed at different positions, comprising means for supporting said trap, means for heating the whole effective length of said trap substantially simultaneously; and means for sealing said trap while all of said components come into a gaseous phase and providing a pressure difference between the opposite ends of said trap after reaching said gaseous phase whereby said sample components are separately and successively stripped out of said trap.
Claim 4
Dependent Claim
93 words
The apparatus oF claim 4, wherein said heating means comprises: a cylindrical heating block covered by a thermal insulator and having a radial groove extending the whole length thereof, and means for supporting said block in parallel with and for movement relative to said trap so that by movement of one of said block and trap relative to the other, said block can be brought to a position where the whole effective length of said trap is enclosed in said radial groove of said block so as to be substantially simultaneously heated thereby.
Claim 5
Dependent Claim
14 words
The apparatus of claim 4, wherein said trap is the column of a chromatograph.
Claim 6
Dependent Claim
46 words
The apparatus of claim 4, wherein said pressure difference providing means comprises a source of a stripping fluid, means for connecting one end of said trap to said fluid source so that said fluid flows through said trap, and means for controlling flowing of said fluid.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |