Patent US2551281A successfully refreshed from Google Patents.
US2551281A
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Automatic gas analyzer
Assignee: EIDP Inc
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Filing: 1944-11-29
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Granted: 1951-05-01
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Expires: 1964-11-29
Abstract
No abstract record available.
Inventors
- 👤 Douglas V Moses
- 👤 John W Brumbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:04
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/8483
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A RECORDING INSTRUMENT FOR GAS ANALYSIS INVOLVING TAPE TRAVEL AND TAPE IMPREGNATION PHASES OF A DETECTING CYCLE, COMPRISING IN COMBINATION A TAPE COLOR SENSITIVE TO A GAS, AN EXPOSURE CHAMBER SUBDIVIDED BY THE TAPE INTO A GAS INLET COMPARTMENT AND A GAS EXIT COMPARTMENT, MEANS FOR PASSING THE TAPE BETWEEN THE COMPARTMENTS, MEANS FOR PASSING GAS THROUGH THE COMPARTMENTS AND THROUGH THE TAPE SUBDIVIDING THE CHAMBER, A PHOTOELECTRIC CELL POSITIONED IN THE GAS COMPARTMENT OPPOSITE AND IN DIRECT VIEW OF THE TAPE WHEREBY THE COLOR INTENSITY OF THE TAPE IS MEASURED BY THE PHOTOELECTRIC CELL DURING THE TAPE''S IMPREGNATION WITH THE GAS BEING ANALYZED, SAID COMPARTMENTS BEING CAPABLE OF RESTRICTED MOVEMENT APART TO PERMIT THE TAPE FREEDOM TO PASS BETWEEN THE COMPATMENTS DURING THE TAPE TRAVELLING PHASE AND MOVEMENT TOGETHER TO HOLD THE TAPE BY THE JUXTAPOSITION OF THE COMPARTMENTS DURING THE TAPE IMPREGNATING PHASE OF THE DETECTING CYCLE.
Claim 2
Dependent Claim
149 words
A RECORDING INSTRUMENT FOR GAS ANALYSIS INVOLVING TAPE TRAVEL AND TAPE IMPREGNATION PHASES OF A DETECTING CYCLE, COMPRISING IN COMBINATION A TAPE COLOR SENSITIVE TO A GAS, AN EXPOSURE CHAMBER SUBDIVIDED BY THE TAPE INTO A GAS INLET COMPARTMENT AND A GAS EXIT COMPARTMENT, MEANS FOR PASSING THE TAPE BETWEEN THE COMPARTMENTS, MEANS FOR PASSING GAS THROUGH THE COMPARTMENTS AND THROUGH THE TAPE SUBDIVIDING THE CHAMBER, A PHOTOELECTRIC CELL POSITIONED IN THE GAS COMPARTMENT OPPOSITE AND IN DIRECT VIEW OF THE TAPE WHEREBY THE COLOR INTENSITY OF THE TAPE IS MEASURED BY THE PHOTOELECTRIC CELL DURING THE TAPE''S IMPREGNATION WITH THE GAS BEING ANALYZED, SAID COMPARTMENTS BEING CAPABLE OF RESTRICTED MOVEMENT APART TO PERMIT THE TAPE FREEDOM TO PASS BETWEEN THE COMPATMENTS DURING THE TAPE TRAVELLING PHASE AND MOVEMENT TOGETHER TO HOLD THE TAPE BY THE JUXTAPOSITION OF THE COMPARTMENTS DURING THE TAPE IMPREGNATING PHASE OF THE DETECTING CYCLE.
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) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |