US4889612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion-selective electrode having a non-metal sensing element
Assignee: Abbott Laboratories
•
Filing: 1987-05-22
•
Granted: 1989-12-26
•
Expires: 2007-05-22
Abstract
Abstract An ion-selective electrode having an electrically insulating substrate with a substantially planar first surface, and having a non-metallic conductor for sensing a potential affixed to the first surface beneath an ion-sensitive membrane. An electrically insulating layer covers at least a portion of the non-metallic conductor and means for making electrical contact with the non-metallic conductor.
Inventors
- 👤 Jill M. Geist
- 👤 Scott C. Messner
- 👤 Thomas G. Schapira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:24
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
112 words
An ion-selective electrode comprising: an electrically insulating substrate having a substantially planar first surface; a non-metallic conductor coupled to said substrate, said non-metallic conductor comprising graphite; means, affixed to said first surface and coupled to said conductor, for sensing a potential located at a situs free of metallization, said means for sensing comprising a non-metallic conductive layer and an exposed ion-selective membrane covering said conductive layer; and an electrically insulating layer covering a portion of said conductor, said electrically insulating layer comprising: a first stratum affixed to said first surface; a second stratum wherein at least a portion thereof is intersolubilized with said membrane; and a third stratum covering said second stratum.
Claim 2
Dependent Claim
112 words
An ion-selective electrode comprising: an electrically insulating substrate having a substantially planar first surface; a non-metallic conductor coupled to said substrate, said non-metallic conductor comprising graphite; means, affixed to said first surface and coupled to said conductor, for sensing a potential located at a situs free of metallization, said means for sensing comprising a non-metallic conductive layer and an exposed ion-selective membrane covering said conductive layer; and an electrically insulating layer covering a portion of said conductor, said electrically insulating layer comprising: a first stratum affixed to said first surface; a second stratum wherein at least a portion thereof is intersolubilized with said membrane; and a third stratum covering said second stratum.
Claim 3
Dependent Claim
71 words
An ion-selective electrode comprising: a substrate; a field effect transistor on said substrate, said field effect transistor having a gate, a source, and a drain; a non-metallic, conductive offset gate coupled to said gate of said field effect transistor, said non-metallic, conductive offset gate comprising graphite; an exposed ion-selective membrane layer covering said offset gate; and an electrically insulating layer covering at least a portion of said non-metallic conductive offset gate.
Claim 4
Dependent Claim
71 words
An ion-selective electrode comprising: a substrate; a field effect transistor on said substrate, said field effect transistor having a gate, a source, and a drain; a non-metallic, conductive offset gate coupled to said gate of said field effect transistor, said non-metallic, conductive offset gate comprising graphite; an exposed ion-selective membrane layer covering said offset gate; and an electrically insulating layer covering at least a portion of said non-metallic conductive offset gate.
Claim 5
Dependent Claim
44 words
The ion-selective electrode as recited in claim 2, wherein said electrically insulating layer comprises a first stratum affixed to said substrate, a second stratum wherein at least a portion thereof is intersolubilized with said membrane layer, and a third stratum covering said second stratum.
Claim 6
Dependent Claim
66 words
An ion-selective electrode comprising: an electrically insulating substrate having a first surface; a metallic conductor at a first situs with respect to said substrate; a non-metallic conductor connecting said metallic conductor to a separate situs on said first surface, said non-metallic conductor comprising graphite; an ion-selective membrane layer covering said separate situs; and an electrically insulating layer covering at least a portion of said non-metallic conductor.
Claim 7
Dependent Claim
66 words
An ion-selective electrode comprising: an electrically insulating substrate having a first surface; a metallic conductor at a first situs with respect to said substrate; a non-metallic conductor connecting said metallic conductor to a separate situs on said first surface, said non-metallic conductor comprising graphite; an ion-selective membrane layer covering said separate situs; and an electrically insulating layer covering at least a portion of said non-metallic conductor.
Claim 8
Dependent Claim
45 words
The ion-selective electrode as recited in claim 4 wherein said electrically insulating layer comprises a first stratum affixed to said first surface, a second stratum wherein at least a portion thereof is intersolubilized with said membrane layer, and a third stratum covering said second stratum.
Claim 9
Dependent Claim
77 words
An ion-selective electrode comprising: an electrically insulating substrate having a substantially planar first surface; a non-metallic conductor coupled to said substrate; means, affixed to said first surface and coupled to said conductor, for sensing a potential located at a situs free of metallization; and an electrically insulating layer covering a portion of said conductor, said insulating layer forming a well above a portion of said conductor, said means for sensing a potential being provided within said well.
Claim 10
Dependent Claim
77 words
An ion-selective electrode comprising: an electrically insulating substrate having a substantially planar first surface; a non-metallic conductor coupled to said substrate; means, affixed to said first surface and coupled to said conductor, for sensing a potential located at a situs free of metallization; and an electrically insulating layer covering a portion of said conductor, said insulating layer forming a well above a portion of said conductor, said means for sensing a potential being provided within said well.
Claim 11
Dependent Claim
86 words
An ion-selective electrode comprising: an electrically insulating substrate; a field effect transistor formed on said substrate, said field effect transistor having a gate, a source, and a drain; a non-metallic, conductive offset gate coupled to said gate of said field effect transistor; an exposed ion-selective membrane layer covering said offset gate; and an electrically insulating layer covering at least a portion of said non-metallic, conductive offset gate, said insulating layer forming a well above said offset gate, said ion-selective membrane layer being provided within said well.
Claim 12
Dependent Claim
86 words
An ion-selective electrode comprising: an electrically insulating substrate; a field effect transistor formed on said substrate, said field effect transistor having a gate, a source, and a drain; a non-metallic, conductive offset gate coupled to said gate of said field effect transistor; an exposed ion-selective membrane layer covering said offset gate; and an electrically insulating layer covering at least a portion of said non-metallic, conductive offset gate, said insulating layer forming a well above said offset gate, said ion-selective membrane layer being provided within said well.
Claim 13
Dependent Claim
109 words
An ion-selective electrode comprising: an electrically insulating substrate having a first surface and a second surface; a metallic conductor at a first situs with respect to said substrate; a non-metallic conductor connecting said metallic conductor to a separate situs on said first surface of said insulating substrate, said non-metallic conductor being on said first surface of said insulating substrate; an ion-selective membrane layer covering said separate situs; and an electrically insulating layer covering at least a portion of said non-metallic conductor, said metallic conductor extending from said non-metallic conductor on said first surface of said insulating substrate through said insulating substrate to said second surface of said insulating substrate.
Claim 14
Dependent Claim
109 words
An ion-selective electrode comprising: an electrically insulating substrate having a first surface and a second surface; a metallic conductor at a first situs with respect to said substrate; a non-metallic conductor connecting said metallic conductor to a separate situs on said first surface of said insulating substrate, said non-metallic conductor being on said first surface of said insulating substrate; an ion-selective membrane layer covering said separate situs; and an electrically insulating layer covering at least a portion of said non-metallic conductor, said metallic conductor extending from said non-metallic conductor on said first surface of said insulating substrate through said insulating substrate to said second surface of said insulating substrate.
References Cited (Backward Citations)
IL33483A
Cited
US3926764A
Cited
US4020830A
Cited
US4020830B1
Cited
US4053381A
Cited
US4133735A
Cited
US4180771A
Cited
US4269682A
Cited
US4276141A
Cited
US4214968A
Cited
US4184936A
Cited
US4225410A
Cited
US4273639A
Cited
US4272328A
Cited
US4397714A
Cited
US4437969A
Cited
US4456522A
Cited
US4486292A
Cited
US4449011A
Cited
US4393130A
Cited
US4528085A
Cited
US4431508A
Cited
US4454007A
Cited
EP0126426A2
Cited
US4683048A
Cited
US4549951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-25 | 1993-06-26 | 1993-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-25 | 1997-06-26 | 1997-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-25 | 2001-06-26 | 2001-12-26 | $7700.00 | Window Closed / Lapsed |