Patent US3710237A successfully refreshed from Google Patents.
US3710237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Probe for a conductivity testing device
Assignee: ChampionX LLC
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Filing: 1970-09-08
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Granted: 1973-01-09
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Expires: 1990-09-08
Abstract
Abstract A probe having at least one conductivity cell defined by a pair of electrodes formed as printed circuitry on a substrate of insulting material such as a printed circuit board. The probe is adapted to be immersed in the solution to be measured, and may or may not include a thermistor on the substrate to compensate for variation in solution temperature. The exposed area of the electrodes and the distance therebetween can be accurately and precisely controlled to provide consistent cell constants in probe manufacture.
Inventors
- 👤 W Watson
- 👤 J Moran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
The combination of a portable probe and a flexible conductor line extending therefrom for use with a Conductivity measuring instrument wherein the probe is adapted to be manually immersible in a solution for measuring the electrolytic conductivity of the solution, said probe comprising, a rigid substrate of insulative material mounted on the end of a flexible conductor line, a plurality of conductivity cells in the form of printed circuitry defined by a single common electrode and a plurality of spaced electrodes of varying surface areas, said conductor line having a lead connected to said common electrode and leads connected to each of said spaced electrodes, a temperature compensating means mounted on the substrate adjacent the electrodes and connected at one end to said common electrode and adapted to be connected at the other end through a lead in the flexible conductor line to a connection point in the instrument to compensate for variation of solution temperature, and means encapsulating the connections and temperature compensating means with insulating material.
Claim 2
Dependent Claim
168 words
The combination of a portable probe and a flexible conductor line extending therefrom for use with a Conductivity measuring instrument wherein the probe is adapted to be manually immersible in a solution for measuring the electrolytic conductivity of the solution, said probe comprising, a rigid substrate of insulative material mounted on the end of a flexible conductor line, a plurality of conductivity cells in the form of printed circuitry defined by a single common electrode and a plurality of spaced electrodes of varying surface areas, said conductor line having a lead connected to said common electrode and leads connected to each of said spaced electrodes, a temperature compensating means mounted on the substrate adjacent the electrodes and connected at one end to said common electrode and adapted to be connected at the other end through a lead in the flexible conductor line to a connection point in the instrument to compensate for variation of solution temperature, and means encapsulating the connections and temperature compensating means with insulating material.
Claim 3
Dependent Claim
170 words
The combination of a portable probe and a flexible conductor line extending therefrom for use with a conductivity measuring instrument wherein the probe is adapted to be manually immersible in a solution for measuring the electrolytic conductivity of the solution, said probe comprising, a rigid substrate of insulative material having front and back faces and mounted on the end of a flexible conductor line, a conductivity cell in the form of printed circuitry defined by one electrode on one face and a second electrode on the other face, said conductor line having a lead connected to said one electrode and a lead connected to said second electrode, a temperature compensating means mounted on the substrate adjacent the electrodes and connected at one end to said one electrode and adapted to be connected at the other end through a lead in the flexible conductor line to a connection point in the instrument to compensate for variation of solution temperature, and means encapsulating the connections and temperature compensating means with insulating material.
Claim 4
Dependent Claim
170 words
The combination of a portable probe and a flexible conductor line extending therefrom for use with a conductivity measuring instrument wherein the probe is adapted to be manually immersible in a solution for measuring the electrolytic conductivity of the solution, said probe comprising, a rigid substrate of insulative material having front and back faces and mounted on the end of a flexible conductor line, a conductivity cell in the form of printed circuitry defined by one electrode on one face and a second electrode on the other face, said conductor line having a lead connected to said one electrode and a lead connected to said second electrode, a temperature compensating means mounted on the substrate adjacent the electrodes and connected at one end to said one electrode and adapted to be connected at the other end through a lead in the flexible conductor line to a connection point in the instrument to compensate for variation of solution temperature, and means encapsulating the connections and temperature compensating means with insulating material.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |