Patent US4416762A successfully refreshed from Google Patents.
US4416762A
Expired / Lapsed
US
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Electrophoretic apparatus
Assignee: Shimadzu Corp
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Filing: 1982-03-22
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Granted: 1983-11-22
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Expires: 2002-03-22
Abstract
Abstract An isotachophoretic apparatus which is equipped with means for discriminating whether each of the zones of a sample having been separated by electrophoresis is a completely separate one having already been separated into a single component or an incompletely separate one. The discriminating means is constructed of means for detecting zones at different instants, e.g., two usual detectors, means for detecting the length of the zones, e.g., a time counter and means for comparing the lengths of the two corresponding zones and judging the completion of separation, e.g., a microcomputer.
Inventors
- 👤 Junichi Akiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:30
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704; G01N27/44717; G01N27/4473
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
128 words
An electrophoretic apparatus including a sample introduction system and a measurement system arranged in this order in an electrophoretic column connected between terminal and leading electrolyte bathes which in turn are connected to both the ends of a high voltage power supply circuit, wherein the improvement resides in that said measurement system includes means for detecting zones of respective sample component ions at different instants of time, means for detecting the lengthes of zones detected, and operation means for comparing the lengthes of the two corresponding zones detected at different instants of time thereby to determine that the two zones are completely separate ones when separation of said zones is completed, when their lengthes can be deemed to be equal, but otherwise the same as incompletely separate zones.
Claim 2
Dependent Claim
128 words
An electrophoretic apparatus including a sample introduction system and a measurement system arranged in this order in an electrophoretic column connected between terminal and leading electrolyte bathes which in turn are connected to both the ends of a high voltage power supply circuit, wherein the improvement resides in that said measurement system includes means for detecting zones of respective sample component ions at different instants of time, means for detecting the lengthes of zones detected, and operation means for comparing the lengthes of the two corresponding zones detected at different instants of time thereby to determine that the two zones are completely separate ones when separation of said zones is completed, when their lengthes can be deemed to be equal, but otherwise the same as incompletely separate zones.
Claim 3
Dependent Claim
34 words
An electrophoretic apparatus as set forth in claim 1, wherein the means for detecting the zones at different instants has two electrophoretic detectors disposed along an electrophoretic tube at a spacing from each other.
Claim 4
Dependent Claim
56 words
An electrophoretic apparatus as set forth in claim 2, wherein the means for detecting the lengthes of the zones is made operative to measure the time interval from the instant when the leading end of a zone is detected by said zone detecting means to the instant when the trailing end of the zone is detected.
Claim 5
Dependent Claim
172 words
An electrophoretic apparatus including a sample introduction system and a measurement system arranged in this order in an electrophoretic column connected between terminal and leading electrolyte bathes which in turn are connected to both the ends of a high voltage power supply circuit, wherein the improvement resides in that said measurement system includes means for detecting zones of respective sample component ions at different instants of time, means for detecting the lengthes of zones detected, said means for detecting the zones at different instants and said means for detecting the lengthes of the zones are constructed of a single electrophoretic detector adapted to be moved along an electrophoretic tube, and means for detecting the migration distance of said detector, and operation means for comparing the lengthes of the two corresponding zones detected at different instants of time thereby to determine that the two zones are completely separate ones when separation of said zones is complete, when their lengthes can be deemed to be equal, but otherwise the same as incompletely separate zones.
Claim 6
Dependent Claim
172 words
An electrophoretic apparatus including a sample introduction system and a measurement system arranged in this order in an electrophoretic column connected between terminal and leading electrolyte bathes which in turn are connected to both the ends of a high voltage power supply circuit, wherein the improvement resides in that said measurement system includes means for detecting zones of respective sample component ions at different instants of time, means for detecting the lengthes of zones detected, said means for detecting the zones at different instants and said means for detecting the lengthes of the zones are constructed of a single electrophoretic detector adapted to be moved along an electrophoretic tube, and means for detecting the migration distance of said detector, and operation means for comparing the lengthes of the two corresponding zones detected at different instants of time thereby to determine that the two zones are completely separate ones when separation of said zones is complete, when their lengthes can be deemed to be equal, but otherwise the same as incompletely separate zones.
Claim 7
Dependent Claim
45 words
An electrophoretic apparatus as set forth in any of the preceding claims 1 to 4, further including operation means for calculating the lengthes of the component zones, when the incompletely separate zones are completely separated, from the lengthes of the corresponding zones at different instants.
Claim 8
Dependent Claim
51 words
An electrophoretic apparatus as set forth in any of the preceding claims 1 to 4, further including operation means for calculating the quantity of a sample, in which the separation of its components can be completed at a predetermined electrophoretic distance, from the lengthes of the corresponding zones at different instants.
Claim 9
Dependent Claim
50 words
An electrophoretic apparatus as set forth in any of the preceding claims 1 to 4, further including operation display means for displaying completion of the separation, in case all the zones of the sample are judged as the completely separate ones, and incompletion of the separation in the otherwise case.
Claim 10
Dependent Claim
25 words
An electrophoretic apparatus as set forth in any of the preceding claims 1 to 4, wherein said electrophoretic column is made of a capillary tube.
References Cited (Backward Citations)
US3649499A
Cited
US3620958A
Cited
DE2303846A1
Cited
US3932264A
Cited
US3941678A
Cited
US4295949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |