Patent US5546004A successfully refreshed from Google Patents.
US5546004A
Expired / Lapsed
US
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Sensor for determining the course of concentration of an adsorbent substance
Assignee: Callahan Cellular LLC
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Filing: 1994-11-04
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Granted: 1996-08-13
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Expires: 2014-11-04
Abstract
Abstract A sensor determines a course of concentration of an adsorbent substance, such as ammonia NH 3 , diffusing out of a flow medium through a surface of a sensor material into the sensor material, as a function of a distance from the surface. Individual pairs of contacts are connected to supply leads and are disposed in the sensor material and optionally on the surface of the sensor material, for determining electrical conductivity of the sensor material between the contacts of the individual pairs of contacts.
Inventors
- 👤 Helmut Schmelz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:06
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; G01N33/0036; G01N33/0054; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/122; G01N33/0031; F; F02; F02B; F02B3/00; F02B3/06; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
99 words
A sensor for determining a course of concentration of an adsorbent substance diffusing out of a flow medium through a surface of a sensor material into the sensor material as a function of a distance from the surface, the sensor comprising: a sensor material having an electrical conductivity depending on a local concentration of an adsorbent substance adsorbed at said sensor material; electric supply leads; and individual pairs of contacts connected to said supply leads and disposed in the sensor material for determining the electrical conductivity of the sensor material between said contacts of said individual pairs of contacts.
Claim 2
Dependent Claim
99 words
A sensor for determining a course of concentration of an adsorbent substance diffusing out of a flow medium through a surface of a sensor material into the sensor material as a function of a distance from the surface, the sensor comprising: a sensor material having an electrical conductivity depending on a local concentration of an adsorbent substance adsorbed at said sensor material; electric supply leads; and individual pairs of contacts connected to said supply leads and disposed in the sensor material for determining the electrical conductivity of the sensor material between said contacts of said individual pairs of contacts.
Claim 3
Dependent Claim
18 words
The sensor according to claim 1, wherein said contacts are disposed on the surface of the sensor material.
Claim 4
Dependent Claim
41 words
The sensor according to claim 1, wherein said pairs of contacts are disposed in a layer of the sensor material at various distances from the surface of the sensor material, and the sensor material is disposed between said pairs of contacts.
Claim 5
Dependent Claim
44 words
The sensor according to claim 1, including a substrate layer, said sensor material being a layer disposed on said substrate layer in which said pairs of contacts are disposed at various distances from the surface of the sensor material oriented toward the flow medium.
Claim 6
Dependent Claim
91 words
The sensor according to claim 4, wherein the sensor material layer has surfaces not being oriented toward the flow medium, one of said pairs of contacts is disposed farthest away from the surface of the sensor material being oriented toward the flow medium, and said contact pairs are disposed at distances from the surfaces of the sensor material layer not being oriented toward the flow medium being greater than the distance of said pair of contacts farthest away from the surface of the sensor material being oriented toward the flow medium.
Claim 7
Dependent Claim
24 words
The sensor according to claim 4, wherein said sensor material layer has surfaces not being oriented toward the flow medium but being gas-tightly sealed.
Claim 8
Dependent Claim
19 words
The sensor according to claim 4, wherein said substrate layer contains said electrical supply leads for the sensor material.
Claim 9
Dependent Claim
19 words
The sensor according to claim 4, including a cylindrical tube having an external thread and surrounding said substrate layer.
Claim 10
Dependent Claim
39 words
The sensor according to claim 8, wherein said tube is cup-shaped and has a bottom with a polygonal engagement surface for a tool, and said electrical supply leads for said pairs of contacts are extended through said cup bottom.
Claim 11
Dependent Claim
43 words
The sensor according to claim 4, including a layer of the sensor material being applied over said substrate layer, and a cylindrical tube having an external thread and surrounding said substrate layer and said layer of sensor material applied over said substrate layer.
Claim 12
Dependent Claim
30 words
The sensor according to claim 1, including a substrate layer on which a plurality of said pairs of contacts are disposed and are variously thickly coated with the sensor material.
Claim 13
Dependent Claim
44 words
The sensor according to claim 1, wherein said contacts of one of said pairs of contacts are spaced apart by a first distance, and immediately adjacently disposed pairs of said contacts are spaced apart by a second distance being greater than said first distance.
Claim 14
Dependent Claim
19 words
The sensor according to claim 1, including means for stabilizing a temperature of a layer of the sensor material.
Claim 15
Dependent Claim
19 words
The sensor according to claim 1, including means for measuring a temperature of a layer of the sensor material.
Claim 16
Dependent Claim
20 words
The sensor according to claim 1, wherein the sensor material includes an oxide having a pH value less than 7.
Claim 17
Dependent Claim
59 words
The sensor according to claim 1, wherein the sensor material includes titanium dioxide TiO 2 and at least one component selected from the group consisting of tungsten oxide WO 3 , molybdenum oxide MoO 3 , vanadium pentoxide V 2 O 5 , and V x Mo y O 32-z , where x+y≦12; x, y are ≧1, and z≦1.
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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) | 1999-08-13 | 2000-02-12 | 2000-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-13 | 2004-02-12 | 2004-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-13 | 2008-02-12 | 2008-08-13 | $7700.00 | Window Closed / Lapsed |