US5173740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid particle analyzer and flow cell therefor
Assignee: Sysmex Corp
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Filing: 1991-07-22
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Granted: 1992-12-22
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Expires: 2011-07-22
Abstract
Abstract A flow cell for a fluid particle analyzer comprises a narrow measuring liquid path, liquid introducing paths continuous to this measuring liquid path, liquid specimen nozzles disposed so that the front ends may be opposite to each other across the measuring liquid path, and sheath liquid inlets and waste liquid outlets disposed in the liquid introducing paths, respectively. The particle analyzer is designed to emit light to the liquid specimen flowing as a sheath flow in the measuring liquid path in the flow cell and detect the light from the particles individually. Since two liquid specimen nozzles are disposed opposite to each other, measurements from the liquid specimen discharging from one of the liquid specimen nozzles can take place while preparation of the other liquid specimen takes place, so that the analysis processing time can be notably shortened.
Inventors
- 👤 Masakazu Fukuda
- 👤 Hiroyuki Nakamoto
- 👤 Hidemichi Tohori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:52
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/14; G01N15/1404
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
In a liquid particle analyzer for passing a sheath liquid around a liquid specimen containing particles, means for emitting light at finely controlled flows of liquid specimen, and individually detecting the light from the particles, and a flow cell, said flow all comprising: means defining a narrow measuring liquid path; means defining liquid introducing paths continuous to the measuring liquid path for introducing liquid into the measuring liquid path; liquid specimen nozzles having nozzle outlets, said liquid specimen nozzles being disposed and held in the liquid introducing paths so that the nozzle outlets are opposite to each other across the measuring liquid path; and sheath liquid inlets and waste liquid outlets respectively disposed in the liquid introducing paths.
Claim 2
Dependent Claim
118 words
In a liquid particle analyzer for passing a sheath liquid around a liquid specimen containing particles, means for emitting light at finely controlled flows of liquid specimen, and individually detecting the light from the particles, and a flow cell, said flow all comprising: means defining a narrow measuring liquid path; means defining liquid introducing paths continuous to the measuring liquid path for introducing liquid into the measuring liquid path; liquid specimen nozzles having nozzle outlets, said liquid specimen nozzles being disposed and held in the liquid introducing paths so that the nozzle outlets are opposite to each other across the measuring liquid path; and sheath liquid inlets and waste liquid outlets respectively disposed in the liquid introducing paths.
Claim 3
Dependent Claim
84 words
A flow cell for a liquid particle analyzer comprising: means defining a narrow measuring liquid path; means defining liquid introducing paths continuous to the measuring liquid path for introducing liquid into the measuring liquid path; liquid specimen nozzles having nozzle outlets, said liquid specimen nozzles being disposed and held in the liquid introducing paths so that the nozzle outlets are opposite to each other across the measuring liquid path; and sheath liquid inlets and waste liquid outlets respectively disposed in the liquid introducing paths.
Claim 4
Dependent Claim
84 words
A flow cell for a liquid particle analyzer comprising: means defining a narrow measuring liquid path; means defining liquid introducing paths continuous to the measuring liquid path for introducing liquid into the measuring liquid path; liquid specimen nozzles having nozzle outlets, said liquid specimen nozzles being disposed and held in the liquid introducing paths so that the nozzle outlets are opposite to each other across the measuring liquid path; and sheath liquid inlets and waste liquid outlets respectively disposed in the liquid introducing paths.
Claim 5
Dependent Claim
52 words
A flow cell for a liquid particle analyzer as set forth in claim 2, further comprising outer covers disposed so as to surround the liquid specimen nozzles, wherein the sheath liquid inlets are disposed at the outside of the outer covers, and waste liquid outlets at the inside of the outer covers.
Claim 6
Dependent Claim
24 words
A flow cell for a liquid particle analyzer as set forth in claim 3, wherein the liquid specimen nozzles are made of conductive material.
Claim 7
Dependent Claim
23 words
A flow cell for a liquid particle analyzer as set forth in claim 3 wherein the outer covers are made of conductive material.
References Cited (Backward Citations)
US4790653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-22 | 1996-06-22 | 1996-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-22 | 2000-06-22 | 2000-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-22 | 2004-06-22 | 2004-12-22 | $7700.00 | Window Closed / Lapsed |