Patent US5429597A successfully refreshed from Google Patents.
US4050895A
Expired / Lapsed
US
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Optical analytical device, waveguide and method
Assignee: Monsanto Research Corp
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Filing: 1976-09-17
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Granted: 1977-09-27
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Expires: 1996-09-17
Abstract
Abstract A device for detecting a first material comprising (a) a waveguide having on a peripheral surface of the waveguide a second material which on contacting the first material selectively combines with the first material to measurably change the light transmitting capabilities of the waveguide, (b) a light source positioned to transmit light into the waveguide, and (c) means for measuring the light exiting from the waveguide. The waveguide described in the previous sentence is a new article of manufacture. The device is useful in a method for detecting a first material comprising the steps of (a) exposing a waveguide having on a peripheral surface of the waveguide a second material to an unknown material which may contain the first material, and second material upon being contacted by the first material selectively combines with the first material to measurably change the light transmitting capabilities of the waveguide; (b) transmitting light through the waveguide after exposure in step (a); and, (c) detecting the light transmitted in step (b) as a measure of the first material. The device and method can be used in either qualitative or quantitative analysis.
Inventors
- 👤 Edgar E. Hardy
- 👤 Donald J. David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:41
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/7703; G01N2021/7706; G01N2021/7709; G01N2021/7769; G01N2021/7783; G01N21/78; G01N21/783; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10S436/00; Y10S436/805; Y10S436/807; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
80 words
A device for detecting a first material comprising a. an elongated waveguide having on a longitudinal peripheral surface of said waveguide a second material providing for multiple internal reflections of light through said material, which second material on contacting said first material selectively combines with said first material to measurably change the light transmitting capabilities of said waveguide, b. a light source positioned to transmit light into said waveguide, and c. means for measuring the light exiting from said waveguide.
Claim 2
Independent Claim
80 words
A device for detecting a first material comprising a. an elongated waveguide having on a longitudinal peripheral surface of said waveguide a second material providing for multiple internal reflections of light through said material, which second material on contacting said first material selectively combines with said first material to measurably change the light transmitting capabilities of said waveguide, b. a light source positioned to transmit light into said waveguide, and c. means for measuring the light exiting from said waveguide.
Claim 3
Dependent Claim
18 words
A device of claim 1 wherein said waveguide is coated with a second material capable of detecting ammonia.
Claim 4
Dependent Claim
17 words
A device of claim 2 wherein said waveguide is coated with ferric sulfate dispersed in polyvinyl alcohol.
Claim 5
Dependent Claim
17 words
A device of claim 2 wherein said waveguide is coated with triketohydrindene hydrate dispersed in polyvinyl alcohol.
Claim 6
Dependent Claim
19 words
A device of claim 1 wherein said waveguide is coated with a second material capable of detecting hydrogen cyanide.
Claim 7
Dependent Claim
17 words
A device of claim 5 wherein said waveguide is coated with sodium picrate dispersed in polyvinyl alcohol.
Claim 8
Dependent Claim
19 words
A device of claim 1 wherein said waveguide is coated with a second material capable of detecting hydrogen sulfide.
Claim 9
Dependent Claim
17 words
A device of claim 7 wherein said waveguide is coated with lead acetate dispersed in polyvinyl acetate.
Claim 10
Dependent Claim
16 words
A device of claim 1 wherein said waveguide is coated with an antibody or an antigen.
Claim 11
Dependent Claim
20 words
A device of claim 1 wherein said waveguide is coated with a second material capable of detecting a combustion gas.
Claim 12
Dependent Claim
20 words
A device of claim 1 wherein said waveguide is coated with a second material capable of detecting a toxic substance.
Claim 13
Dependent Claim
48 words
An elongated waveguide having on a longitudinal peripheral surface of said waveguide a second material providing for multiple internal reflections of light through said material, which second material upon contacting a first material selectively combines said first material to measurably change the light transmitting capabilities of said waveguide.
Claim 14
Dependent Claim
48 words
An elongated waveguide having on a longitudinal peripheral surface of said waveguide a second material providing for multiple internal reflections of light through said material, which second material upon contacting a first material selectively combines said first material to measurably change the light transmitting capabilities of said waveguide.
Claim 15
Dependent Claim
18 words
A waveguide of claim 12 wherein said waveguide is coated with a second material capable of detecting ammonia.
Claim 16
Dependent Claim
17 words
A waveguide of claim 13 wherein said waveguide is coated with ferric sulfate dispersed in polyvinyl alcohol.
Claim 17
Dependent Claim
17 words
A waveguide of claim 13 wherein said waveguide is coated with triketohydrindene hydrate dispersed in polyvinyl alcohol.
Claim 18
Dependent Claim
19 words
A waveguide of claim 12 wherein said waveguide is coated with a second material capable of detecting hydrogen cyanide.
Claim 19
Dependent Claim
17 words
A waveguide of claim 16 wherein said waveguide is coated with sodium picrate dispersed in polyvinyl alcohol.
Claim 20
Dependent Claim
19 words
A waveguide of claim 12 wherein said waveguide is coated with a second material capable of detecting hydrogen sulfide.
Claim 21
Dependent Claim
17 words
A waveguide of claim 18 wherein said waveguide is coated with lead acetate dispersed in polyvinyl acetate.
Claim 22
Dependent Claim
16 words
A waveguide of claim 12 wherein said waveguide is coated with an antibody or an antigen.
Claim 23
Dependent Claim
20 words
A waveguide of claim 12 wherein said waveguide is coated with a second material capable of detecting a combustion gas.
Claim 24
Dependent Claim
20 words
A waveguide of claim 12 wherein said waveguide is coated with a second material capable of detecting a toxic substance.
Claim 25
Independent Claim
101 words
A method for detecting a first material comprising the steps of a. exposing an elongated waveguide having on a longitudinal peripheral surface of said waveguide a second material providing for multiple internal reflections of light through said material, to an unknown material which may contain said first material, said second material upon being contacted by said first material selectively combines with said first material to measurably change the light transmitting capabilities of said waveguide; b. transmitting light through said waveguide after exposure in step (a); and, c. detecting the light transmitted in step (b) as a measure of said first material.
Claim 26
Independent Claim
101 words
A method for detecting a first material comprising the steps of a. exposing an elongated waveguide having on a longitudinal peripheral surface of said waveguide a second material providing for multiple internal reflections of light through said material, to an unknown material which may contain said first material, said second material upon being contacted by said first material selectively combines with said first material to measurably change the light transmitting capabilities of said waveguide; b. transmitting light through said waveguide after exposure in step (a); and, c. detecting the light transmitted in step (b) as a measure of said first material.
Claim 27
Dependent Claim
11 words
A method of claim 23 wherein said first material comprises ammonia.
Claim 28
Dependent Claim
17 words
A method of claim 24 wherein said waveguide is coated with ferric sulfate dispersed in polyvinyl alcohol.
Claim 29
Dependent Claim
17 words
A method of claim 24 wherein said waveguide is coated with triketohydrindene hydrate dispersed in polyvinyl alcohol.
Claim 30
Dependent Claim
12 words
A method of claim 23 wherein said first material comprises hydrogen cyanide.
Claim 31
Dependent Claim
17 words
A method of claim 27 wherein said waveguide is coated with sodium picrate dispersed in polyvinyl alcohol.
Claim 32
Dependent Claim
19 words
A method of claim 23 wherein said waveguide is coated with a second material capable of detecting hydrogen sulfide.
Claim 33
Dependent Claim
17 words
A method of claim 29 wherein said waveguide is coated with lead acetate dispersed in polyvinyl acetate.
Claim 34
Dependent Claim
23 words
A method of claim 23 wherein said waveguide is coated with an antibody and said first material comprises the antigen for said antibody.
Claim 35
Dependent Claim
23 words
A method of claim 23 wherein said waveguide is coated with an antigen and said first material comprises an antibody for said antigen.
Claim 36
Dependent Claim
20 words
A method of claim 23 wherein said waveguide is coated with a second material capable of detecting a combustion gas.
Claim 37
Dependent Claim
20 words
A method of claim 23 wherein said waveguide is coated with a second material capable of detecting a toxic substance.
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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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |