US4534651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photometric biochemical analyzer
Assignee: Toshiba Corp
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Filing: 1984-03-29
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Granted: 1985-08-13
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Expires: 2004-03-29
Abstract
Abstract In accordance with the present invention, apparatus for photometric light absorption measurements of liquid samples contained in reaction cuvettes comprises a temperature controlled bath unit in which at least one light path conversion means is immersed in the fluid bath medium and is provided with at least two layers, one light-reflective layer and one non-corrosive layer on a surface thereof.
Inventors
- 👤 Tomiharu Minikane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:15
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/255
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
124 words
Photometric analyzing apparatus comprising: temperature controlled bath unit means including at least a pair of light entrance and exit windows at the bottom portion thereof; light path conversion means positioned adjacent to said respective windows of said bath unit means, said light path conversion means comprising at least a first thin layer of light reflective material applied to a light path conversion surface thereof and a second thin layer of chemically resistant material covering said first layer, said light path conversion means defining a light inspection path; means for positioning a fluid sample within said bath unit means in said light inspection path; and means for transmitting a light beam through said light path conversion means to irradiate said fluid sample for photometric analysis.
Claim 2
Dependent Claim
124 words
Photometric analyzing apparatus comprising: temperature controlled bath unit means including at least a pair of light entrance and exit windows at the bottom portion thereof; light path conversion means positioned adjacent to said respective windows of said bath unit means, said light path conversion means comprising at least a first thin layer of light reflective material applied to a light path conversion surface thereof and a second thin layer of chemically resistant material covering said first layer, said light path conversion means defining a light inspection path; means for positioning a fluid sample within said bath unit means in said light inspection path; and means for transmitting a light beam through said light path conversion means to irradiate said fluid sample for photometric analysis.
Claim 3
Dependent Claim
30 words
Photometric analyzing apparatus according to claim 1 wherein said light reflective material is aluminum, and said chemically resistant material is selected from a group consisting of titanium, chlorine and silicon.
Claim 4
Dependent Claim
26 words
Photometric analyzing apparatus according to claim 1 further comprising a third thin layer of chemically resistant material covering said second thin layer of chemically resistant material.
Claim 5
Dependent Claim
28 words
Apparatus according to claim 3 wherein said second thin layer comprises a buffer layer of chlorine and said third thin layer comprises a top covering layer of titanium.
Claim 6
Dependent Claim
21 words
Apparatus according to claim 1 further comprising a glass plate adhesively fixed to cover said thin layer of chemically resistant material.
Claim 7
Dependent Claim
97 words
Photometric analyzing apparatus for simultaneously measuring plural samples comprising; means movable along a temperature controlled bath unit for supporting a plurality of sample cuvettes partially immersed in a fluid medium contained in said bath unit; a plurality of light path conversion means positioned in said bath unit, each including at least a light reflective layer and a chemically resistant layer thereon defining a light inspection path intersecting one of said sample cuvettes; and means transmitting a light beam through said plurality of light path conversion means to simultaneously irradiate said plurality of sample cuvettes for photometric analysis.
Claim 8
Dependent Claim
97 words
Photometric analyzing apparatus for simultaneously measuring plural samples comprising; means movable along a temperature controlled bath unit for supporting a plurality of sample cuvettes partially immersed in a fluid medium contained in said bath unit; a plurality of light path conversion means positioned in said bath unit, each including at least a light reflective layer and a chemically resistant layer thereon defining a light inspection path intersecting one of said sample cuvettes; and means transmitting a light beam through said plurality of light path conversion means to simultaneously irradiate said plurality of sample cuvettes for photometric analysis.
Claim 9
Dependent Claim
16 words
Apparatus according to claim 6 wherein each said light path conversion means has a U-shaped body.
Claim 10
Dependent Claim
28 words
Apparatus according to claim 6 wherein each of said light path conversion means includes two different angled light reflection surfaces defining a plurality of staggered light inspection paths.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |