Patent US4823168A successfully refreshed from Google Patents.
US4823168A
Expired / Lapsed
US
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Flow-through cell for a photometer formed using a pair of cell body members
Assignee: Hitachi Ltd
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Filing: 1987-11-04
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Granted: 1989-04-18
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Expires: 2007-11-04
Abstract
Abstract A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, at least one of which is provided with a linear groove on the joining surface of the cell body member from one end to another to the full length, as exposed to the joining surface, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the grooves, the linear groove being provided with a light reflecting layer to the full length of the linear groove, and a pair of light transmission window members joined with the flow cell body at both ends on the groove-open sides thereof is provided, where polishing of the grooves is readily carried out and random reflection of light or absorption of light due to poor reflection is reduced, and the turbulent flow of a liquid sample and generation of noise are suppressed.
Inventors
- 👤 Masao Kamahori
- 👤 Yoshio Watanabe
- 👤 Junkichi Miura
- 👤 Mamoru Taki
- 👤 Hiroyuki Miyagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:30
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/05; G01N2021/0346; G01N2021/054; G01N30/00; G01N30/02; G01N30/62; G01N30/74; G01N2030/746
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
163 words
A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, at least one of which is provided with a linear groove on the joining surface of the cell body member from one end to another to the full length, as exposed to the joining surface, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being formed of a material selected from the group consisting of glass, silicon and silicon oxide, and a pair of light transmission window members joined with the flow cell body at both ends of the groove-open sides thereof.
Claim 2
Dependent Claim
163 words
A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, at least one of which is provided with a linear groove on the joining surface of the cell body member from one end to another to the full length, as exposed to the joining surface, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being formed of a material selected from the group consisting of glass, silicon and silicon oxide, and a pair of light transmission window members joined with the flow cell body at both ends of the groove-open sides thereof.
Claim 3
Dependent Claim
48 words
A flow cell for a photometer according to claim 1, wherein the liquid sample inlet passage and the liquid sample outlet passage are provided as grooves on the joining surface of the cell body member, as exposed to the joining surface and communicated with the first linear groove.
Claim 4
Dependent Claim
32 words
A flow cell for a photometer according to claim 2, wherein the liquid sample inlet passage and the liquid sample outlet passage are communicated with the first linear grooves at round corners.
Claim 5
Dependent Claim
27 words
A flow cell for a photometer according to claim 2, wherein the liquid sample inlet passage and the liquid sample outlet passage are in a S shape.
Claim 6
Dependent Claim
55 words
A flow cell for a photometer according to claim 1, wherein said linear grooves are grooves provided by fixing a pair of body members together and drilling through at least one of the body members to form grooves, and then polishing the grooves, so as to form the linear grooves of the cell body members.
Claim 7
Dependent Claim
26 words
A flow cell for a photometer according to claim 1, wherein the cell body members and light transmission window members are made of the same material.
Claim 8
Dependent Claim
21 words
A flow cell for a photometer according to claim 1, wherein the pair of cell body members are joined by bonding.
Claim 9
Dependent Claim
20 words
A flow cell for a photometer according to claim 7, wherein the bonding is a melt bonding or pressure bonding.
Claim 10
Dependent Claim
26 words
A flow cell for a photometer according to claim 1, wherein the liquid sample passage and detecting light path have a cross-sectional shape of a circle.
Claim 11
Dependent Claim
169 words
A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, both of which are provided with linear grooves symmetrically to each other on the joining surfaces of the cell body members from one end to another to the full length, as exposed to the joining surfaces, the grooves playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and at least one of which is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being formed of a material selected from the group consisting of glass, silicon and silicon oxide, and a pair of light transmission window members joined with the flow cell body at both ends on the groove-open sides thereof.
Claim 12
Dependent Claim
169 words
A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, both of which are provided with linear grooves symmetrically to each other on the joining surfaces of the cell body members from one end to another to the full length, as exposed to the joining surfaces, the grooves playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and at least one of which is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being formed of a material selected from the group consisting of glass, silicon and silicon oxide, and a pair of light transmission window members joined with the flow cell body at both ends on the groove-open sides thereof.
Claim 13
Dependent Claim
52 words
A flow cell for a photometer according to claim 10, wherein the liquid sample inlet passage and the liquid sample outlet passage are provided as grooves symmetrically to each other on the joining surfaces of both cell body members, as exposed to the joining surfaces and communicated with the first linear grooves.
Claim 14
Dependent Claim
32 words
A flow cell for a photometer according to claim 11, wherein the liquid sample inlet passage and the liquid sample outlet passage are communicated with the first linear grooves at round corners.
Claim 15
Dependent Claim
27 words
A flow cell for a photometer according to claim 11, wherein the liquid sample inlet passage and the liquid sample outlet passage are in a S shape.
Claim 16
Dependent Claim
181 words
A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, at least one of which is provided with a linear groove on the joining surface of the cell body member from one end to another to the full length, as exposed to the joining surface, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being made of a material selected from the group consisting of glass, silicon and silicon oxide, the linear groove being provided with a light reflecting layer to the full length of the linear groove, and a pair of light transmission window members joined with the flow cell body at both ends on the groove-open sides thereof.
Claim 17
Dependent Claim
181 words
A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, at least one of which is provided with a linear groove on the joining surface of the cell body member from one end to another to the full length, as exposed to the joining surface, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being made of a material selected from the group consisting of glass, silicon and silicon oxide, the linear groove being provided with a light reflecting layer to the full length of the linear groove, and a pair of light transmission window members joined with the flow cell body at both ends on the groove-open sides thereof.
Claim 18
Dependent Claim
48 words
A flow cell for a photometer according to claim 14, wherein the liquid sample inlet passage and the liquid sample outlet passage are provided as grooves on the joining surface of the cell body member, as exposed to the joining surface and communicated with the first linear groove.
Claim 19
Dependent Claim
32 words
A flow cell for a photometer according to claim 14, wherein the liquid sample inlet passage and the liquid sample outlet passage are communicated with the first linear grooves at round corners.
Claim 20
Dependent Claim
27 words
A flow cell for a photometer according to claim 14, wherein the liquid sample inlet passage and the liquid sample outlet passage are in a S shape.
Claim 21
Dependent Claim
53 words
A flow cell for a photometer according to claim 14, wherein the photometer is adapted to have a liquid sample pass therethrough, the liquid sample including a solvent, and wherein said light reflecting layer is composed of a glass having a lower refractive index than that of the solvent of the liquid sample.
Claim 22
Dependent Claim
27 words
A flow cell for a photometer according to claim 14, wherein the light reflecting layer is made of aluminum, and has a coating of silicon oxide thereon.
Claim 23
Dependent Claim
188 words
A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, both of which are provided with linear grooves symmetrically to each other on the joining surfaces of the cell body members from one end to another to the full length, as exposed to the joining surfaces, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and at least one of which is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being made of a material selected from the group consisting of glass, silicon and silicon oxide, the linear grooves being provided with a light reflecting layer to the full length of the linear grooves, and a pair of light transmission window members joined with the flow cell body at both ends on the groove open sides thereof.
Claim 24
Dependent Claim
188 words
A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, both of which are provided with linear grooves symmetrically to each other on the joining surfaces of the cell body members from one end to another to the full length, as exposed to the joining surfaces, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and at least one of which is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being made of a material selected from the group consisting of glass, silicon and silicon oxide, the linear grooves being provided with a light reflecting layer to the full length of the linear grooves, and a pair of light transmission window members joined with the flow cell body at both ends on the groove open sides thereof.
Claim 25
Dependent Claim
51 words
A flow cell for a photometer according to claim 20, wherein the liquid sample inlet passage and the liquid sample outlet passage are provided as grooves symmetrically to each other on the joining of both cell body members, as exposed to the joining surfaces and communicated with the first linear grooves.
Claim 26
Dependent Claim
32 words
A flow cell for a photometer according to claim 21, wherein the liquid sample inlet passage and the liquid sample outlet passage are communicated with the first linear grooves at round corners.
Claim 27
Dependent Claim
27 words
A flow cell for a photometer according to claim 21, wherein the liquid sample inlet passage and the liquid sample outlet passage are in a S shape.
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |