Patent US3617460A successfully refreshed from Google Patents.
US3617460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode assembly
Assignee: Beckman Coulter Inc
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Filing: 1969-12-17
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Granted: 1971-11-02
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Expires: 1989-12-17
Abstract
Abstract An electrochemical electrode assembly for making ion concentration measurements in which a capillary tube open at its rear end and closed by an ion-sensitive barrier at its forward end is removably mounted in a tubular electrode body. A conductor fixedly mounted at the rear end of the tubular body extends through the open rear end of the capillary tube for connection to an internal half cell immersed in electrolyte in the tube. Due to the surface tension of the electrolyte on the wall of the capillary tube, the electrolyte will not escape through the open end of the tube during normal handling of the electrode assembly. In one embodiment, an organic ion exchanger liquid is provided in the capillary tube between an ion-permeable membrane at the forward end of the tube and the electrolyte in which the half cell is immersed. The surface tension of the two liquids on the wall of the capillary tube ensures that the ion-exchanger liquid will not be displaced by the electrolyte and, therefore, the ion exchanger will remain in contact with the membrane.
Inventors
- 👤 Irwin H Krull
- 👤 Charles A Mask
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
An assembly as set forth in claim 1 wherein: said mounting means comprises a second cap threadedly engaged to said first member adjacent the forward end thereof, said cap having an opening therethrough coaxial with said barrier; said second member is formed with an outwardly extending flange adjacent to said forward end thereof, said flange engaging the forward end of said first member; and said second cap including a rearwardly facing surface engaging said flange and urging the same into sealing engagement with said forward end of said first member.
Claim 2
Dependent Claim
57 words
An assembly as set forth in claim 2 wherein: said flange is spaced rearwardly from said forward end of said second member to provide a tubular barrier support forward of said flange; said barrier is mounted on said support; and said support extends through the opening in said cap and beyond the forward face of said cap.
Claim 3
Dependent Claim
65 words
An assembly as set forth in claim 3 wherein: said barrier comprises a solid, plasticlike material having an ion exchanger incorporated therein; and said material fills the forward end portion of said barrier support and extends in the form of a coating over said forward end and the outer surface of the portion of said support that extends beyond said forward face of said cap.
Claim 4
Dependent Claim
52 words
An assembly as set forth in claim 1 wherein: said barrier comprises a solid, plasticlike material having an ion exchanger incorporated therein; and said material fills the forward end portion of said second member and extends over said forward end and the outer surface thereof in the form of a surface coating.
Claim 5
Dependent Claim
20 words
An assembly as set forth in claim 1 wherein: said conductor is a wire coaxially positioned within said first member.
Claim 6
Dependent Claim
25 words
An assembly as set forth in claim 6 including: positioning means in said first member for maintaining said wire coaxially positioned in said first member.
Claim 7
Dependent Claim
26 words
An assembly as set forth in claim 1 wherein: said first member is formed of a plastic and said second member is formed of nonconductive glass.
Claim 8
Dependent Claim
115 words
An electrode assembly comprising: a capillary tube having a forward end closed by an ion-sensitive barrier and an open rear end; a hollow tubular member surrounding said tube; said tubular member having a closed rear end and an open forward end; cap means removably mounted on said forward end of said tubular member, said cap means fixedly holding said capillary tube in said tubular member with said barrier being exposed to the exterior of said member adjacent the forward end thereof; an internal half cell positioned within said capillary tube; and a conductor extending from said half cell through said open rear end of said capillary tube to said rear end of said tubular member.
Claim 9
Dependent Claim
23 words
An electrode assembly as set forth in claim 9 wherein: the wall of said tubular member is devoid of an electrolyte filling port.
Claim 10
Dependent Claim
68 words
An electrode assembly comprising: a sensor assembly comprising a tubular member having a capillary passage therethrough and an ion-sensitive barrier closing the forward end of said passage, the rear end of said passage being open; a hollow electrode body; means removably mounting said sensor assembly in said body; and an internal half cell carried by said body and extending into said capillary passage through said rear end thereof.
Claim 11
Dependent Claim
118 words
An electrode assembly for measuring the ion concentration of a solution comprising: a body having an elongated capillary passage therein; an ion-permeable barrier closing one end of said passage and adapted to contact said solution; an organic ion exchanger liquid substantially immiscible with said solution filling the portion of said passage immediately adjacent to said barrier; an aqueous electrolyte substantially immiscible with said liquid located in said passage in contact with said liquid at the surface thereof remote from said barrier; an internal half cell positioned in said passage to contact said electrolyte; and said liquid and electrolyte remaining in their relative positions in said passage due to the surface tension thereof on the wall of said passage.
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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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |