US2847643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detecting device
Assignee: Phillips Petroleum Co
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Filing: 1951-04-09
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Granted: 1958-08-12
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Expires: 1971-04-09
Abstract
No abstract record available.
Inventors
- 👤 Boisblanc Deslonde R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:57
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/68; G01N27/70; G01N27/626; G08; G08B; G08B17/00; G08B17/10; G08B17/11; G08B17/113
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
222 words
APPARATUS TO DETECT AN ION PRODUCING CHEMICAL REACTION COMPRISING AN ELECTRICALLY CONDUCTIVE CERAMIC RESISTANCE ELEMENT ADAPTED TO BE POSITIONED DIRECTLY WITHIN THE REGION OF THE REACTION TOS BE DETECTED, A FIRST AMPLIFIER ADAPTED TO PASS FLUCTUATING VOLTAGE SIGNALS, THE INPUT TERMINALS OF SAID FIRST AMPLIFIER BEING CONNECTED TO RESPECTIVE END TERMINALS OF SAID RESISTANCE ELEMENT, A FIRST CAPACITOR HAVING ONE TERMINAL THEREOF CONNECTED TO THE FIRST OUTPUT TERMINAL OF SAID FIRST AMPLIFIER, A UNIDIRECTIONAL CURRENT CONDUCTING ELEMENT HAVING ONE TERMINAL THEREOF CONNECTED TO THE SECOND TERMINAL OF SAID FIRST CAPACITOR, A SECOND AMPLIFIER, THE SECOND TERMINAL OF SAID CONDUCTING ELEMENT BEING CONNECTED TO THE FIRST INPUT TERMINAL OF SAID SECOND AMPLIFIER, MEANS CONNECTING THE SECOND OUTPUT TERMINAL OF SAID FIRST AMPLIFIER TO THE SECOND INPUT TERMINAL OF SAID SECOND AMPLIFIER, A FIRST RESISTOR HAVING ONE TERMINAL THEREOF CONNECTED TO THE SECOND TERMINAL OF SAID FIRST CAPACITOR, THE SECOND TERMINAL OF SAID FIRST REISTOR BEING CONNECTED TO THE SECOND OUTPUT TERMINAL OF SAID FIRST AMPLIFIER, A SECOND RESISTOR HAVING ONE TERMINAL THEREOF CONNECTED TO THE FIRST INPUT TERMINAL OF SAID SECOND AMPLIFIER,S THE SECOND TERMINAL OF SAID SECOND REISTOR BEING CONNECTED TO THE SECOND INPUT TERMINAL OF SAID SECOND AMPLIFIER, A SECOND CAPACITOR CONNECTED IN PARALLEL WITH SAID SECOND RESISTOR, AND CURRENT INDICATING MEANS CONNECTED TOS THE OUTPUT TERMINALS OF SAID SECOND AMPLIFIER.
References Cited (Backward Citations)
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US2316872A
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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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |