Patent US2729097A successfully refreshed from Google Patents.
US2729097A
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Apparatus for analyzing gases
Assignee: Compagnie de Saint Gobain SA
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Filing: 1952-01-03
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Granted: 1956-01-03
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Expires: 1972-01-03
Abstract
No abstract record available.
Inventors
- 👤 Claude M Cherrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:20
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/22; G01N27/24; G01N27/72; G01N27/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
GAS ANALYZING APPARATUS COMPRISING PARALLEL GAS CONDUITS INTERCONNECTED BY A CROSS CONDUIT, MEANS TO FLOW A GAS THROUGH SAID PARALLEL CONDUITS, MEANS GENERATING A MAGNETIC FIELD IN THE CROSS CONDUIT, AUDIO FREQUENCY CURRENT SUPPLIED HEATING RESISTANCES DISPOSED WITHIN THE CONDUITS NEAR THE ENDS OF THE CROSS CONDUIT COMPRISING ARMS OF AN ELECTRICAL MEASURING BRIDGE, AND LOW FREQUENCY MEANS TO HEAT THE GAS FLOWING THROUGH THE CROSS CONDUIT.
Claim 2
Dependent Claim
67 words
GAS ANALYZING APPARATUS COMPRISING PARALLEL GAS CONDUITS INTERCONNECTED BY A CROSS CONDUIT, MEANS TO FLOW A GAS THROUGH SAID PARALLEL CONDUITS, MEANS GENERATING A MAGNETIC FIELD IN THE CROSS CONDUIT, AUDIO FREQUENCY CURRENT SUPPLIED HEATING RESISTANCES DISPOSED WITHIN THE CONDUITS NEAR THE ENDS OF THE CROSS CONDUIT COMPRISING ARMS OF AN ELECTRICAL MEASURING BRIDGE, AND LOW FREQUENCY MEANS TO HEAT THE GAS FLOWING THROUGH THE CROSS CONDUIT.
References Cited (Backward Citations)
US2135587A
Cited
US2111786A
Cited
DE742690C
Cited
US2603965A
Cited
US2650496A
Cited
US2603964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |