US2506535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas analysis apparatus
Assignee: NINA D ZAIKOWSKY
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Filing: 1945-03-13
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Granted: 1950-05-02
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Expires: 1965-03-13
Abstract
No abstract record available.
Inventors
- 👤 Wladimir M Zaikowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:27
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/18; G01N27/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A CELL CONSTRUCTION FOR GAS ANALYSIS BY MEASUREMENT OF TEMPERATURE CHANGE OF A HEATED FILAMENT COMPRISING: A PAIR OF MEMBERS HAVING CLOSELY FITTED SURFACES AND MEANS FOR CLAMPING THEM TOGETHER, SAID MEMBERS BEING SO CONFIGURED AS TO DEFINE A FILAMENT CHAMBER BOUNDED BY SAID FITTED SURFACES, A FILAMENT AND MEANS SUPPORTING IT IN SAID CHAMBER AND MAKING ELECTRICAL CONNECTION THERETO, ONE OF SAID MEMBERS CONTAINING
Claim 2
Dependent Claim
65 words
A CELL CONSTRUCTION FOR GAS ANALYSIS BY MEASUREMENT OF TEMPERATURE CHANGE OF A HEATED FILAMENT COMPRISING: A PAIR OF MEMBERS HAVING CLOSELY FITTED SURFACES AND MEANS FOR CLAMPING THEM TOGETHER, SAID MEMBERS BEING SO CONFIGURED AS TO DEFINE A FILAMENT CHAMBER BOUNDED BY SAID FITTED SURFACES, A FILAMENT AND MEANS SUPPORTING IT IN SAID CHAMBER AND MAKING ELECTRICAL CONNECTION THERETO, ONE OF SAID MEMBERS CONTAINING
References Cited (Backward Citations)
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Cited
US2013998A
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Cited
US1954681A
Cited
US2211627A
Cited
US2269850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |