US5290419A
Expired / Lapsed
US
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Fluorescence detection type electrophoresis apparatus
Assignee: Hitachi Software Engineering Co Ltd
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Filing: 1993-04-12
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Granted: 1994-03-01
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Expires: 2013-04-12
Abstract
Abstract In the multi-color fluorescence detection type electrophoresis apparatus provided with the electrophoresis gel plate, excitation laser source, means to separate the fluorescence images according to each emission wavelength, and the detector of the fluorescence subjected to wavelength selection, two or more laser sources are provided, each of laser lights is irradiated on the sample on a time-sharing basis, and the filter which cuts off the scattered light of each the laser synchronous with the laser beam is installed in front of the wavelength separation means thereby providing simultaneous, quick and real-time analysis of a great number of samples such as DNA and RNA labeled by many types of fluorophores, without overlapping the wavelengths of the excitation light and the fluorescence.
Inventors
- 👤 Hideki Kambara
- 👤 Takashi Anazawa
- 👤 Keiichi Nagai
- 👤 Hiroaki Machida
- 👤 Hisanori Nasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:18
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704; G01N27/44717; G01N27/44721
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
In the electrophoresis apparatus comprising i) means for electrophoretically separating a group of samples composed of the samples labeled by a plurality types of fluorophores, ii) excitation means for exciting the fluorophores labeling said samples and emitting fluorescence, iii) means for selecting wavelength of said fluorescence, and iv) means for detecting said fluorescence subjected to wavelength selection; a fluorescence detection type electrophoresis apparatus characterized in that said excitation means provides time-shared irradiation of the samples by a plurality of excitation lights, and said means for selecting wavelength has scattered light cut off filters synchronous with the time-shared irradiation of said plurality of excitation lights.
Claim 2
Dependent Claim
104 words
In the electrophoresis apparatus comprising i) means for electrophoretically separating a group of samples composed of the samples labeled by a plurality types of fluorophores, ii) excitation means for exciting the fluorophores labeling said samples and emitting fluorescence, iii) means for selecting wavelength of said fluorescence, and iv) means for detecting said fluorescence subjected to wavelength selection; a fluorescence detection type electrophoresis apparatus characterized in that said excitation means provides time-shared irradiation of the samples by a plurality of excitation lights, and said means for selecting wavelength has scattered light cut off filters synchronous with the time-shared irradiation of said plurality of excitation lights.
Claim 3
Dependent Claim
31 words
A fluorescence detection type electrophoresis apparatus according to claim 1 wherein said scattered light cutoff filter is changed with the light source change to cut the excitation light reaching said filter.
Claim 4
Dependent Claim
52 words
A fluorescence detection type electrophoresis apparatus according to claim 2 wherein said means for selecting wavelength is provided with the fluorescence image splitting means and band pass filters in the same number as that of the split images, where, at least, one of the filters has two or more different transmission bands.
Claim 5
Dependent Claim
23 words
A fluorescence detection type electrophoresis apparatus according to claim 2 wherein said means for selecting wavelength is provided with a wavelength dispersion prism.
Claim 6
Dependent Claim
28 words
A fluorescence detection type electrophoresis apparatus according to claim 2 wherein said means for selecting wavelength is provided with a dichroic mirror having a plurality of transmission bands.
Claim 7
Dependent Claim
23 words
A fluorescence detection type electrophoresis apparatus according to claim 2 wherein said means for electrophoretically separating a group of samples is gel electrophoresis.
Claim 8
Dependent Claim
31 words
A fluorescence detection type electrophoresis apparatus according to claim 1 wherein said scattered light cutoff filters are installed on the front of the means which separates fluorescences according to each wavelength.
Claim 9
Dependent Claim
23 words
A fluorescence detection type electrophoresis apparatus according to claim 1 wherein each of said plurality of excitation lights excites two types of fluorophores.
Claim 10
Dependent Claim
23 words
A fluorescence detection type electrophoresis apparatus according to claim 1 wherein said means for detecting said fluorescence is composed of photo-linesensors or photo-areasensors.
References Cited (Backward Citations)
JPS6144353A
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JPS63231247A
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JPH01116441A
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US4832815A
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JPH03293557A
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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) | 1997-02-28 | 1997-08-30 | 1998-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-28 | 2001-08-30 | 2002-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-28 | 2005-08-30 | 2006-03-01 | $7700.00 | Window Closed / Lapsed |