US4254223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for colorimetric determination
Assignee: Akzona Inc
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Filing: 1979-04-16
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Granted: 1981-03-03
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Expires: 1999-04-16
Abstract
Abstract An apparatus for use in the colorimetric determination of liquids is disclosed wherein the apparatus is a reaction vessel having a massive V-shaped bottom of transparent material with a refractive index of n≧1.4. The bottom has a cone- or prism-shape with an apical angle from about 80° to about 100° or the shape of a polyhedral pyramid whose opposing surfaces intersect at an angle between about 80° and about 100°. The apparatus permits speeded-up colorimetric determinations.
Inventors
- 👤 Antonius H. W. M. Schuurs
- 👤 Johannes H. W. Leuvering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:33
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/0303; Y; Y10; Y10S; Y10S435/00; Y10S435/808
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
An apparatus for use in performing colorimetric determinations of liquids comprising a reaction vessel for the liquid provided with a solid V-shaped bottom of transparent material having a refractive index of n≧1.4, said bottom having a cone- or prism-shape with an apical angle from about 80° to about 100°, or the shape of a polyhedral pyramid whose opposing surfaces intersect at an angle between about 80° and about 100°.
Claim 2
Independent Claim
69 words
An apparatus for use in performing colorimetric determinations of liquids comprising a reaction vessel for the liquid provided with a solid V-shaped bottom of transparent material having a refractive index of n≧1.4, said bottom having a cone- or prism-shape with an apical angle from about 80° to about 100°, or the shape of a polyhedral pyramid whose opposing surfaces intersect at an angle between about 80° and about 100°.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein said V-shaped bottom has an angle of about 90°.
Claim 4
Independent Claim
114 words
An apparatus for use in performing colorimetric determinations of liquids comprising at least one reaction vessel for the liquids provided with a solid V-shaped bottom of transparent material having a refractive index of n≧1.4, said bottom having a cone- or prism-shape with an apical angle from about 80° to about 100°, or the shape of a polyhedral pyramid whose opposing surfaces intersect at an angle between about 80° and about 100°, wherein said V-shaped bottom has an outside border of a material other than air and wherein the ratio of the refractive index of the outside border material to the refractive index of the transparent material is less than or equal to 1/2 √2.
Claim 5
Independent Claim
114 words
An apparatus for use in performing colorimetric determinations of liquids comprising at least one reaction vessel for the liquids provided with a solid V-shaped bottom of transparent material having a refractive index of n≧1.4, said bottom having a cone- or prism-shape with an apical angle from about 80° to about 100°, or the shape of a polyhedral pyramid whose opposing surfaces intersect at an angle between about 80° and about 100°, wherein said V-shaped bottom has an outside border of a material other than air and wherein the ratio of the refractive index of the outside border material to the refractive index of the transparent material is less than or equal to 1/2 √2.
Claim 6
Dependent Claim
12 words
The apparatus of claim 3 comprising a plurality of said reaction vessels.
Claim 7
Dependent Claim
17 words
The apparatus of claim 3 wherein the inside of said vessel is coated with an immunological component.
Claim 8
Dependent Claim
25 words
The apparatus of claim 5 wherein said immunological component is selected from the group consisting of an antigen, an antibody, a hapten, and an anti-antibody.
Claim 9
Independent Claim
117 words
An apparatus for use in performing colorimetric determinations or liquids comprising a reaction vessel for the liquids having a cylindrical upper portion and provided with a solid V-shaped bottom of transparent material having a refractive index of n≧1.4, said bottom having a cone- or prism-shape with an apical angle from about 80° to about 100°, or the shape of a polyhedral pyramid whose opposing surfaces intersect at an angle between about 80° and about 100°, wherein said V-shaped bottom has an outside border of a material other than air and wherein the ratio of the refractive index of the outside border material to the refractive index of the transparent material is less than or equal to 1/2√2.
Claim 10
Independent Claim
117 words
An apparatus for use in performing colorimetric determinations or liquids comprising a reaction vessel for the liquids having a cylindrical upper portion and provided with a solid V-shaped bottom of transparent material having a refractive index of n≧1.4, said bottom having a cone- or prism-shape with an apical angle from about 80° to about 100°, or the shape of a polyhedral pyramid whose opposing surfaces intersect at an angle between about 80° and about 100°, wherein said V-shaped bottom has an outside border of a material other than air and wherein the ratio of the refractive index of the outside border material to the refractive index of the transparent material is less than or equal to 1/2√2.
Claim 11
Independent Claim
85 words
An apparatus for use in performing colorimetric determination of liquids comprising a reaction vessel for the liquids having a cylindrical upper portion and provided with a solid V-shaped bottom of transparent material having a reflective index of n≧1.4, said bottom having a cone- or prism-shape with an apical angle from about 80° to about 100°, or the shape of a polyhedral pyramid whose opposing surfaces intersect at an angle between 80° and about 100° C., wherein said V-shaped bottom has an outside border of air.
Claim 12
Independent Claim
85 words
An apparatus for use in performing colorimetric determination of liquids comprising a reaction vessel for the liquids having a cylindrical upper portion and provided with a solid V-shaped bottom of transparent material having a reflective index of n≧1.4, said bottom having a cone- or prism-shape with an apical angle from about 80° to about 100°, or the shape of a polyhedral pyramid whose opposing surfaces intersect at an angle between 80° and about 100° C., wherein said V-shaped bottom has an outside border of air.
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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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |