US3880737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination electrode
Assignee: BECKMAN RIIC Ltd
•
Filing: 1973-06-25
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Granted: 1975-04-29
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Expires: 1993-06-25
Abstract
Abstract A combination electrode for use in electrmetric measurements of ion concentration and activity. A glass sensing electrode has arranged round its body a reference electrode which comprises a reference element and a salt bridge and which is held in place by a sleeve. The salt bridge comprises a layer of crystalline salt bridge material and a layer of an absortbant material.
Inventors
- 👤 Alfred Edwin Brunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:32
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/401; G01N27/403; G01N27/4035
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
A COMBINATION ELECTRODE COMPRISING A GLASS SENSING ELECTRODE AND A REFERENCE ELECTRODE, SAID REFERENCE ELECTRODE COMPRISING: A LAYER OF A CRYSTALLINE SALT BRIDGE MATERIAL ENCIRCLING THE BODY OF THE SENSING ELECTRODE; A LAYER OF AN ABSORBENT FOR A SALT BRIDGE SOLUTION LYING WITHIN THE CRYSTALLINE LAYER AND EXTENDING TO ONE END OF THE CRYSTALLINE LAYER; A REFERENCE CONDUCTOR EXTENDING INTO THE SALT BRIDGE MATERIAL AND MAKING ELECTRICAL CINTACT WITH THE SALT BRIDGE SOLUTION IN THE ABSORBENT LAYER; AND A SLEEVE TO RETAIN THE CRYSTALLINE LAYER IN POSITION, SAID SLEEVE BEING OPEN AT THE SAID ONE END OF THE CRYSTALLINE LAYER TO PROVIDE DIRECT COMMUNICATION BETWEEN THE ABSORBENT LAYER AND THE EXTERIOR OF THE ELECTRODE AND BEING CLOSED AT THE OPPOSITE END OF SAID CRYSTALLINE LAYER.
Claim 2
Dependent Claim
125 words
A COMBINATION ELECTRODE COMPRISING A GLASS SENSING ELECTRODE AND A REFERENCE ELECTRODE, SAID REFERENCE ELECTRODE COMPRISING: A LAYER OF A CRYSTALLINE SALT BRIDGE MATERIAL ENCIRCLING THE BODY OF THE SENSING ELECTRODE; A LAYER OF AN ABSORBENT FOR A SALT BRIDGE SOLUTION LYING WITHIN THE CRYSTALLINE LAYER AND EXTENDING TO ONE END OF THE CRYSTALLINE LAYER; A REFERENCE CONDUCTOR EXTENDING INTO THE SALT BRIDGE MATERIAL AND MAKING ELECTRICAL CINTACT WITH THE SALT BRIDGE SOLUTION IN THE ABSORBENT LAYER; AND A SLEEVE TO RETAIN THE CRYSTALLINE LAYER IN POSITION, SAID SLEEVE BEING OPEN AT THE SAID ONE END OF THE CRYSTALLINE LAYER TO PROVIDE DIRECT COMMUNICATION BETWEEN THE ABSORBENT LAYER AND THE EXTERIOR OF THE ELECTRODE AND BEING CLOSED AT THE OPPOSITE END OF SAID CRYSTALLINE LAYER.
Claim 3
Dependent Claim
17 words
A combination electrode as claimed in claim 1 in which said absorbent comprises a woven glass-fibre material.
References Cited (Backward Citations)
US2755243A
Cited
US3530849A
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US3676319A
Cited
US3708411A
Cited
US3705089A
Cited
US3718569A
Cited
US3741884A
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |