Patent US4613422A successfully refreshed from Google Patents.
US4613422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ambient sensing devices
Assignee: Integrated Ionics Inc
•
Filing: 1984-01-19
•
Granted: 1986-09-23
•
Expires: 2004-01-19
Abstract
Abstract A device for the measurement of ionic and gas species at high temperatures. Platinum metal oxides are used for the electrical signal paths between electrical elements on the device to make the device particularly adaptable to high temperature measurement applications. Chemically sensitive composite structures may be hardened for high temperature applications by mixing polyimide with the materials normally used in the outer layer of such structure.
Inventors
- 👤 Imants R. Lauks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:05
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335; H; H10; H10W; H10W90/00; H10W90/701; H10W90/751; H10W90/753
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
87 words
A device for the measurement of a chemical or an ionic species comprising: an amorphous oxide of a metal of the platinum or rhenium groups of metals, and a layer of material sensitive to said chemical or ionic species distinct from said amorphous metal oxide formed on said amorphous metal oxide and in electrical contact therewith, said sensitive layer developing an electrical potential upon contact with said chemical or ionic species and said metal oxide transmitting an electrical signal that is a function of said electrical potential.
Claim 2
Independent Claim
87 words
A device for the measurement of a chemical or an ionic species comprising: an amorphous oxide of a metal of the platinum or rhenium groups of metals, and a layer of material sensitive to said chemical or ionic species distinct from said amorphous metal oxide formed on said amorphous metal oxide and in electrical contact therewith, said sensitive layer developing an electrical potential upon contact with said chemical or ionic species and said metal oxide transmitting an electrical signal that is a function of said electrical potential.
Claim 3
Dependent Claim
13 words
The device of claim 1 wherein said metal oxide is sputtered iridium oxide.
Claim 4
Dependent Claim
53 words
The device of claim 1 further comprising a continuous semi-permeable outermost layer that is a mixture of polyimide and either polytetrafluorethylene or zeolite, said outermost layer overlaying said sensitive layer and separating it from an environment in which the device is located but permeable to the chemical or ionic species to be measured.
Claim 5
Dependent Claim
30 words
The device of claim 3 wherein said sensitive material is one or more of AgCl, AgBr, AgI, LaF 3 , Ag 2 S, HgS and Bi 2 S 3 .
Claim 6
Independent Claim
68 words
A device for the measurement of a chemical or ionic species comprising: a chemically sensitive layer that develops an electrical potential representative of the concentration of said species, and one or more continuous semi-permeable layers overlaying said sensitive layer and separating it from an environment in which the device is located but permeable to the chemical or ionic species to be measured, wherein the outermost layer contains polyimide.
Claim 7
Independent Claim
68 words
A device for the measurement of a chemical or ionic species comprising: a chemically sensitive layer that develops an electrical potential representative of the concentration of said species, and one or more continuous semi-permeable layers overlaying said sensitive layer and separating it from an environment in which the device is located but permeable to the chemical or ionic species to be measured, wherein the outermost layer contains polyimide.
Claim 8
Independent Claim
94 words
A device for the measurement of activity of a gas species comprising: a chemically sensitive layer which develops an electrical potential representative of the concentration of said gas when the device is exposed to said gas; means in electrical contact with said chemical sensitive layer for transmitting a signal that is a function of said electrical potential; a gas conducting aqueous epoxy medium in electrochemical contact with said chemical sensitive layer, and a heterogeneous membrane containing polyimide, said membrane separating said epoxy medium from said gas species and being permeable to said gas species.
Claim 9
Independent Claim
94 words
A device for the measurement of activity of a gas species comprising: a chemically sensitive layer which develops an electrical potential representative of the concentration of said gas when the device is exposed to said gas; means in electrical contact with said chemical sensitive layer for transmitting a signal that is a function of said electrical potential; a gas conducting aqueous epoxy medium in electrochemical contact with said chemical sensitive layer, and a heterogeneous membrane containing polyimide, said membrane separating said epoxy medium from said gas species and being permeable to said gas species.
Claim 10
Dependent Claim
29 words
The device of claim 6 wherein said chemically sensitive layer comprises sputtered iridium oxide and said aqueous epoxy medium comprises epoxy, H 2 O, NaHCO 3 , and NaCl.
Claim 11
Dependent Claim
27 words
The device of claim 6 wherein said chemically sensitive layer comprises Ag 2 S and said aqueous epoxy medium comprises epoxy, H 2 O, NaHS, and NaCl.
Claim 12
Dependent Claim
87 words
The device of claim 6 wherein said means in electrical contact with said chemically sensitive layer comprises a metal oxide as a conductive underlayment, said metal being selected from the platinum and rhenium group of metals; and said chemically sensitive layer on and in electrical contact with said underlayment develops an electrical potential upon contact with said gas species and undergoes a reversible reaction with said metal oxide whereby said metal oxide transmits an electrical signal that is a function of the activity of said gas species.
Claim 13
Dependent Claim
16 words
The device of claim 6 wherein said heterogeneous membrane comprises polytetrafluoroethylene or zeolite suspended in polyimide.
Claim 14
Independent Claim
63 words
A device for the measurement of a gas species comprising: a chemically sensitive layer that develops an electrical potential representative of the concentration of said gas, and one or more continuous semi-permeable layers overlaying said sensitive layer and separating it from an environment in which the device is located, wherein the outermost layer is a mixture of polyimide and either polytetrafluoroethylene or zeolite.
Claim 15
Independent Claim
63 words
A device for the measurement of a gas species comprising: a chemically sensitive layer that develops an electrical potential representative of the concentration of said gas, and one or more continuous semi-permeable layers overlaying said sensitive layer and separating it from an environment in which the device is located, wherein the outermost layer is a mixture of polyimide and either polytetrafluoroethylene or zeolite.
Claim 16
Independent Claim
128 words
A device for the measurement of activity of an ionic species comprising: a ceramic container filled with an electrolyte medium and containing a reference electrode; a chemically sensitive layer mounted on an exterior surface of said container; electronic circuitry connected to said layer and mounted on said surface of said container wherein said chemically sensitive layer and said electronic circuitry are made with materials which are stable at high temperatures; signal paths interconnecting said chemically sensitive layer and said electronic circuitry; a hermetic seal encompassing said electronic circuitry; and one or more continuous semi-permeable layers overlaying said sensitive layer and separating it from an environment in which the device is located but permeable to the chemical or ionic species to be measured, wherein the outermost layer contains polyimide.
Claim 17
Independent Claim
128 words
A device for the measurement of activity of an ionic species comprising: a ceramic container filled with an electrolyte medium and containing a reference electrode; a chemically sensitive layer mounted on an exterior surface of said container; electronic circuitry connected to said layer and mounted on said surface of said container wherein said chemically sensitive layer and said electronic circuitry are made with materials which are stable at high temperatures; signal paths interconnecting said chemically sensitive layer and said electronic circuitry; a hermetic seal encompassing said electronic circuitry; and one or more continuous semi-permeable layers overlaying said sensitive layer and separating it from an environment in which the device is located but permeable to the chemical or ionic species to be measured, wherein the outermost layer contains polyimide.
Claim 18
Dependent Claim
31 words
The device of claim 12 wherein said chemically sensitive layer comprises one or more of AgCl, AgBr, AgI, LaF 3 , Ag 2 S, HgS and Bi 2 S 3 .
Claim 19
Dependent Claim
14 words
The device of claim 12 wherein said electronic circuitry comprises one or more amplifiers.
Claim 20
Dependent Claim
18 words
The device of claim 12 comprising a plurality of sensitive layers sensitive to different chemical or ionic species.
Claim 21
Dependent Claim
20 words
The device of claim 12 where said signal path comprises a metal from the platinum or rhenium group of metals.
Claim 22
Dependent Claim
12 words
The device of claim 12 wherein said signal path comprises iridium oxide.
Claim 23
Dependent Claim
21 words
The device of claim 15 wherein said signal path is sputtered onto said ceramic substrate to a depth approximating 1000 Angstroms.
Claim 24
Independent Claim
120 words
A device for the measurement of a chemical or an ionic species comprising: an amorphous oxide of a metal of the platinum or rhenium groups of metals, a layer of material sensitive to said chemical or ionic species formed on said amorphous metal oxide and in electrical contact therewith, said sensitive layer developing an electrical potential upon contact with said chemical or ionic species and said metal oxide transmitting an electrical signal that is a function of said electrical potential, and one or more continuous semi-permeable layers overlaying said sensitive layer and separating it from an environment in which the device is located but permeable to the chemical or ionic species to be measured, wherein the outermost layer contains polyimide.
Claim 25
Independent Claim
120 words
A device for the measurement of a chemical or an ionic species comprising: an amorphous oxide of a metal of the platinum or rhenium groups of metals, a layer of material sensitive to said chemical or ionic species formed on said amorphous metal oxide and in electrical contact therewith, said sensitive layer developing an electrical potential upon contact with said chemical or ionic species and said metal oxide transmitting an electrical signal that is a function of said electrical potential, and one or more continuous semi-permeable layers overlaying said sensitive layer and separating it from an environment in which the device is located but permeable to the chemical or ionic species to be measured, wherein the outermost layer contains polyimide.
Claim 26
Dependent Claim
19 words
The device of claim 19 wherein the outermost layer is a mixture of polyimide and either polytetrafluoroethylene or zeolite.
Claim 27
Dependent Claim
30 words
The device of claim 19 wherein said sensitive material is one or more of AgCl, AgBr, AgI, LaF 3 , Ag 2 S, HgS and Bi 2 S 3 .
Claim 28
Dependent Claim
18 words
The device of claim 19 comprising a plurality of sensitive layers sensitive to different chemical or ionic species.
References Cited (Backward Citations)
US3911901A
Cited
US3923627A
Cited
US3926766A
Cited
US4020830A
Cited
US4020830B1
Cited
US4273636A
Cited
US4133735A
Cited
US4456522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |