US3948753A
Expired / Lapsed
US
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Apparatus for isotachophoretical separation
Assignee: Pfizer Health AB
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Filing: 1974-11-13
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Granted: 1976-04-06
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Expires: 1994-11-13
Abstract
Abstract Apparatus for isotachophoretical separation consists of a capillary tube communicating with the sampling zone of a separating column between the leading and terminating electrolytes which are maintained at different electrical potentials.
Inventors
- 👤 Tord Lennart Arlinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:12
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704; G01N27/44717
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
102 words
Apparatus for isotachophoretical separation, comprising a column consisting of a capillary tube and arranged between two electrodes, the sample subject to separation being introduced into said column between leading and terminating electrolytes, respectively, a detector for detection of different sample zones being arranged in a position along the column, characterized in a shunt tube bifurcating from the column in close proximity to the detector position, said shunt tube having smaller cross section than the column and having an open outer end provided with a closable lid, and means for providing a flow of leading electrolyte in the direction towards the sample zones.
Claim 2
Dependent Claim
102 words
Apparatus for isotachophoretical separation, comprising a column consisting of a capillary tube and arranged between two electrodes, the sample subject to separation being introduced into said column between leading and terminating electrolytes, respectively, a detector for detection of different sample zones being arranged in a position along the column, characterized in a shunt tube bifurcating from the column in close proximity to the detector position, said shunt tube having smaller cross section than the column and having an open outer end provided with a closable lid, and means for providing a flow of leading electrolyte in the direction towards the sample zones.
Claim 3
Dependent Claim
23 words
Apparatus according to claim 1, characterized in a collecting device for sample zones achieved, arranged at the outer end of the shunt tube.
Claim 4
Dependent Claim
56 words
Apparatus according to claim 2, characterized in that the collecting device comprises a carrier, which at a certain rate is conducted past the outer end of the shunt tube, an air gap being at hand between the tube end and the carrier, and that an electrical potential is maintained between the tube end and the carrier.
Claim 5
Dependent Claim
16 words
Apparatus according to claim 3, characterized in that said carrier consists of a filter paper strip.
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |