Patent US5204516A successfully refreshed from Google Patents.
US2782102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas analyzer
Assignee: Schneider Electric Systems USA Inc
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Filing: 1954-08-31
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Granted: 1957-02-19
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Expires: 1974-08-31
Abstract
No abstract record available.
Inventors
- 👤 Wilfred H Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:00
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN AN ELECTRICAL BRIDGE GAS COMBUSTIBILITY MEASURING SYSTEM, IN COMBINATION, A DIRECT CURRENT EXCITED ELECTRICAL BRIDGE, A REFERENCE RESISTANCE IN ONE ARM OF SAID BRIDGE, A MEASURING RESISTANCE IN ANOTHER ARM OF SAID BRIDGE, MEANS FOR ASSOCIATING GAS WITH SAID MEASURING RESISTANCE FOR COMBUSTION BY HEAT FROM SAID MEASURING RESISTANC, A FIRST ALTERNATING CURRENT SUPPLY MEANS ESSENTIALLY EXCLUSIVELY OPERATIVELY ASSOCIATED WITH SAID REFERENCE RESISTANCE ARM FOR PRODUCING A PREDETERMINED SET VALUE OF ALTERNATING CURRENT IN SAID REFERENCE RESISTANCE, A SECOND ALTERNATING CURRENT SUPPLY MEANS ESSENTIALLY EXCLUSIVELY OPERATIVELY ASSOCIATED WITH SAID MEASURING RESISTANCE ARM FOR PRODUCING AND VARYING A GAS COMBUSTION TEMPERATURE IN SAID MEASURING RESISTANCE, MEANS OPERATIVELY CONNECTING THE OUTPUT OF SAID DIRECT CURRENT BRIDGE TO SAID SECOND ALTERNATING CURRENT SUPPLY MEANS, WHEREBY A PREDETERMINED RESISTANCE VALUE RELATION IS MAINTAINED BETWEEN SAID MEASURING RESISTANCE AND SAID REFERENCE RESISTANCE, AND MEANS FOR MAKING THE DIRECT CURRENT FUNCTION IN SAID BRIDGE COMPATIBLE WITH RESPECT TO SAID ALTERNATING CURRENT COMPONENTS.
Claim 2
Dependent Claim
157 words
IN AN ELECTRICAL BRIDGE GAS COMBUSTIBILITY MEASURING SYSTEM, IN COMBINATION, A DIRECT CURRENT EXCITED ELECTRICAL BRIDGE, A REFERENCE RESISTANCE IN ONE ARM OF SAID BRIDGE, A MEASURING RESISTANCE IN ANOTHER ARM OF SAID BRIDGE, MEANS FOR ASSOCIATING GAS WITH SAID MEASURING RESISTANCE FOR COMBUSTION BY HEAT FROM SAID MEASURING RESISTANC, A FIRST ALTERNATING CURRENT SUPPLY MEANS ESSENTIALLY EXCLUSIVELY OPERATIVELY ASSOCIATED WITH SAID REFERENCE RESISTANCE ARM FOR PRODUCING A PREDETERMINED SET VALUE OF ALTERNATING CURRENT IN SAID REFERENCE RESISTANCE, A SECOND ALTERNATING CURRENT SUPPLY MEANS ESSENTIALLY EXCLUSIVELY OPERATIVELY ASSOCIATED WITH SAID MEASURING RESISTANCE ARM FOR PRODUCING AND VARYING A GAS COMBUSTION TEMPERATURE IN SAID MEASURING RESISTANCE, MEANS OPERATIVELY CONNECTING THE OUTPUT OF SAID DIRECT CURRENT BRIDGE TO SAID SECOND ALTERNATING CURRENT SUPPLY MEANS, WHEREBY A PREDETERMINED RESISTANCE VALUE RELATION IS MAINTAINED BETWEEN SAID MEASURING RESISTANCE AND SAID REFERENCE RESISTANCE, AND MEANS FOR MAKING THE DIRECT CURRENT FUNCTION IN SAID BRIDGE COMPATIBLE WITH RESPECT TO SAID ALTERNATING CURRENT COMPONENTS.
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) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |