US3853732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode structure for potentiometric sample analysis
Assignee: Bayer Corp
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Filing: 1972-04-10
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Granted: 1974-12-10
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Expires: 1992-04-10
Abstract
Abstract A reference electrode structure for use in electrochemical measurements well adapted for inclusion in a compact unit including a cooperating ion-selective electrode, for liquid sample analysis of the continuous-flow type, and which reference electrode is of the open liquid junction type. The structure provides a straight-through path portion for the sample flowing in a stream and having at least substantially full circumferential exposure with an electrolyte or salt bridge of the reference electrode, which electrolyte flows in the aforementioned liquid junction. Use is not restricted to analysis of the continuous-flow type but includes analysis of the batch type.
Inventors
- 👤 A Brand
- 👤 K Rao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:50
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/4166
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
An apparatus for electrochemical measurements of the continuous-flow type, comprising: first and second body members of electrical insulating material defining a continuous-flow sample passageway therethrough having a sample inlet in one of said members and a sample discharge in the other of said members, said members defining an annular electrolyte chamber and a second passageway having an outlet into said sample passageway substantially around the latter''s circumference and forming an open liquid junction between said annular electrolyte chamber and said sample passageway, said second passageway being formed at said outlet thereof and throughout its length between cooperating wall surfaces of the respective members, said cooperating wall surfaces extending in a direction transverse of said sample passageway, and a sensing electrode extending into said sample passageway and having an ion-selective surface exposed in said sample passageway, one of said members being movable away from the other of said members to vary the cross-sectional dimension of said second passageway.
Claim 2
Independent Claim
157 words
An apparatus for electrochemical measurements of the continuous-flow type, comprising: first and second body members of electrical insulating material defining a continuous-flow sample passageway therethrough having a sample inlet in one of said members and a sample discharge in the other of said members, said members defining an annular electrolyte chamber and a second passageway having an outlet into said sample passageway substantially around the latter''s circumference and forming an open liquid junction between said annular electrolyte chamber and said sample passageway, said second passageway being formed at said outlet thereof and throughout its length between cooperating wall surfaces of the respective members, said cooperating wall surfaces extending in a direction transverse of said sample passageway, and a sensing electrode extending into said sample passageway and having an ion-selective surface exposed in said sample passageway, one of said members being movable away from the other of said members to vary the cross-sectional dimension of said second passageway.
Claim 3
Dependent Claim
48 words
Apparatus as defined in claim 1, wherein: said passageway is formed by a conical recess in one of said members and a complemental boss on the other of said members and extending at least partially into said recess, the sample path being through said recess and said boss.
Claim 4
Dependent Claim
21 words
Apparatus as defined in claim 2, wherein: said second passageway is inclined in the direction of flow in the sample passageway.
Claim 5
Dependent Claim
32 words
Apparatus as defined in claim 2, wherein: said second passageway formed between said conical recess and said complemental boss is formed by contacting surfaces of said conical recess and said complemental boss.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |