Patent US4502214A successfully refreshed from Google Patents.
US4502214A
Expired / Lapsed
US
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Method of making reference electrode
Assignee: Aesculap Werke AG
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Filing: 1982-04-29
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Granted: 1985-03-05
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Expires: 2002-04-29
Abstract
Abstract A method of making a wire reference electrode in an electrolytic cell is provided wherein the wire reference electrode comprises a lead-in wire portion, a reference wire portion, a sealing material to seal the junction of the lead-in and wire reference portions, and a heat shrinkable insulating material which is heated for a predetermined period of time to collapse the heat shrinkable insulating material about the sealing material.
Inventors
- 👤 Ronald C. Miles
- 👤 George W. Geren
- 👤 R. W. Peel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:50
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/301; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49174; Y10T29/49176; Y10T29/49178
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
211 words
A method of making a wire reference electrode comprising: (a) fastening a lead-in wire to a reference wire portion; (b) cleaning the reference wire portion with acetone; (c) washing the reference wire portion with soap and water; (d) etching the reference wire portion in a concentrated acid solution for a predetermined period of time; (e) rinsing the reference wire portion with deionized water for a predetermined period of time; (f) applying a coating of ruthenium chloride solution; (g) heating the wire reference electrode at a temperature from about 300° C. to about 500° C. for a predetermined period of time; (h) repeating substeps (f) and (g) a predetermined number of times; (i) surrounding at least a portion of the lead-in wire and a portion of the reference wire portion with a fluorinated ethylene polymer sealing means; (j) surrounding at least a portion of the sealing means with a heat shrinkable means collapsible thereabout; and (h) heating the fluorinated ethylene polymer sealing means and the heat shrinkable means with heating means for a predetermined period of time until the heat shrinkable means collapses about the fluorinated ethylene polymer sealing means to form a liquid-tight seal and an electrically insulating covering about the lead-in wire and a portion of the reference wire portion.
Claim 2
Independent Claim
211 words
A method of making a wire reference electrode comprising: (a) fastening a lead-in wire to a reference wire portion; (b) cleaning the reference wire portion with acetone; (c) washing the reference wire portion with soap and water; (d) etching the reference wire portion in a concentrated acid solution for a predetermined period of time; (e) rinsing the reference wire portion with deionized water for a predetermined period of time; (f) applying a coating of ruthenium chloride solution; (g) heating the wire reference electrode at a temperature from about 300° C. to about 500° C. for a predetermined period of time; (h) repeating substeps (f) and (g) a predetermined number of times; (i) surrounding at least a portion of the lead-in wire and a portion of the reference wire portion with a fluorinated ethylene polymer sealing means; (j) surrounding at least a portion of the sealing means with a heat shrinkable means collapsible thereabout; and (h) heating the fluorinated ethylene polymer sealing means and the heat shrinkable means with heating means for a predetermined period of time until the heat shrinkable means collapses about the fluorinated ethylene polymer sealing means to form a liquid-tight seal and an electrically insulating covering about the lead-in wire and a portion of the reference wire portion.
Claim 3
Dependent Claim
20 words
The method according to claim 1 wherein the etching of the reference wire portion employs a concentrated hydrochloric acid solution.
Claim 4
Dependent Claim
23 words
The method according to claim 1 wherein the etching of the reference wire portion is done for about 6 to about 14 minutes.
Claim 5
Dependent Claim
23 words
The method according to claim 1 wherein the etching of the reference wire portion is done for about 8 to about 12 minutes.
Claim 6
Dependent Claim
20 words
The method according to claim 2 wherein the etching of the reference wire portion is done for about 10 minutes.
Claim 7
Dependent Claim
26 words
The method according to claim 1 wherein the rinsing of the reference wire portion is done with deionized water for about 6 to about 20 minutes.
Claim 8
Dependent Claim
26 words
The method according to claim 1 wherein the rinsing of the reference wire portion is done with deionized water for about 6 to about 15 minutes.
Claim 9
Dependent Claim
26 words
The method according to claim 1 wherein the rinsing of the reference wire portion is done with deionized water for about 6 to about 8 minutes.
Claim 10
Dependent Claim
30 words
The method according to claim 1 wherein the heating of the wire reference electrode is done immediately after applying the ruthenium chloride solution for about 1 to about 6 minutes.
Claim 11
Dependent Claim
30 words
The method according to claim 1 wherein the heating of the wire reference electrode is done immediately after applying the ruthenium chloride solution for about 3 to about 5 minutes.
Claim 12
Dependent Claim
31 words
The method according to claim 1 wherein the heating of the wire reference electrode is done immediately after applying the ruthenium chloride solution at about 400° C. for about 5 minutes.
Claim 13
Dependent Claim
15 words
The method according to claim 1 wherein substeps (f) and (g) are repeated four times.
Claim 14
Dependent Claim
19 words
The method according to claim 12 including heating the wire reference electrode for about 4 to about 8 hours.
Claim 15
Dependent Claim
20 words
The method according to claim 12 including heating the wire reference electrode at about 400° C. for about 6 hours.
Claim 16
Dependent Claim
15 words
The method according to claim 1 further comprising using titanium for the reference wire portion.
Claim 17
Dependent Claim
17 words
The method according to claim 1 further comprising using a palladium/silver alloy for the reference wire portion.
Claim 18
Dependent Claim
23 words
The method according to claim 16 further comprising using approximately a 75% palladium and 25% silver alloy composition for the reference wire portion.
Claim 19
Independent Claim
30 words
The method according to claims 16 or 17 further comprising cleaning the reference wire portion by immersing in a concentrated nitric acid solution for about 1 to about 10 minutes.
Claim 20
Dependent Claim
22 words
The method according to claim 18 further comprising cleaning the reference wire portion by immersing in a 70% concentrated nitric acid solution.
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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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |