Patent US3669864A successfully refreshed from Google Patents.
US3669864A
Expired / Lapsed
US
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Polarographic electrode apparatus and method
Assignee: ROBERT R FIKE
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Filing: 1969-09-02
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Granted: 1972-06-13
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Expires: 1989-09-02
Abstract
Abstract A polarographic electrode assembly comprising a confined working electrode is described. The electrode assembly is adapted to fit against a portion of a thin layer chromatogram to form a polarographic cell in which the electrodes of the electrode assembly are all in contact with an isolated zone of the thin layer containing a spot of substance to be assayed. A method of using the polarographic electrode assembly to assay materials separated by thin layer chromatography without elution of the spots containing the substance is also described.
Inventors
- 👤 Robert R Fike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:55
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/42; G01N27/48; G01N30/00; G01N30/90; G01N30/95
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
A polarographic cell comprising a support plate, thin layer separatory means for retaining a substance to be analyzed as a spot in a thin layer; said thin layer means including a layer of adsorbent material on the support plate, an electrode holder having a face thereof disposed against the thin layer separatory means, a reference electrode mounted in the electrode holder and contacting the thin layer separatory means, a confined working electrode mounted in the electrode holder spaced from the reference electrode and contacting the thin layer separatory means; said working electrode being adapted to contact a spot in the thin layer of the separatory means, closed-loop barrier means between the support plate and the electrode holder and surrounding the thin layer separatory means for providing a seal between the support plate and electrode holder to enclose the thin layer separatory means therebetween whereby a polarographic cell is defined and bounded by the support plate, electrode holder and barrier means.
Claim 2
Dependent Claim
160 words
A polarographic cell comprising a support plate, thin layer separatory means for retaining a substance to be analyzed as a spot in a thin layer; said thin layer means including a layer of adsorbent material on the support plate, an electrode holder having a face thereof disposed against the thin layer separatory means, a reference electrode mounted in the electrode holder and contacting the thin layer separatory means, a confined working electrode mounted in the electrode holder spaced from the reference electrode and contacting the thin layer separatory means; said working electrode being adapted to contact a spot in the thin layer of the separatory means, closed-loop barrier means between the support plate and the electrode holder and surrounding the thin layer separatory means for providing a seal between the support plate and electrode holder to enclose the thin layer separatory means therebetween whereby a polarographic cell is defined and bounded by the support plate, electrode holder and barrier means.
Claim 3
Dependent Claim
16 words
The cell of claim 1 further comprising inlet means for introducing an electrolyte into the cell.
Claim 4
Dependent Claim
14 words
The cell of claim 2 wherein tHe working electrode is a carbon paste electrode.
Claim 5
Dependent Claim
25 words
The cell of claim 1 further comprising a counter electrode contacting the thin layer separatory means and spaced from the reference electrode and working electrode.
Claim 6
Dependent Claim
20 words
The cell of claim 1 wherein the thin layer separatory means and the support plate comprise a thin layer chromatogram.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |