US2899281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic ozone analyzer
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:42
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/48; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/206664
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
AN APPARATUS FOR DETECTING AND QUANTITATIVELY INDICATING THE CONCENTRATION OF OZONE IN THE ATMOSPHERE WHICH COMPRISES IN COMBINATION A MASSIVE CASING OF INERT METAL, A CIRCUITOUS FLOW CHANNEL THROUGH SAID CASING, SAID FLOW CHANNEL DISCHARGING INTO A TEST CHAMBER ARRANGED AXIALLY OF SAID FLOW CHANNEL, MEANS FOR ESTABLISHING A FLOW OF TEST GASES THROUGH SAID CHANNEL AT A UNIFORM RATE, MEANS FOR MAINTAINING THE TEMPERATURE OF SAID CASING AT A SELECTED UNIFORM LEVEL, DETECTOR MEANS INCLUDING FIRST AND SECOND MATCHED THERMISTORS IN SEPARATE ARMS OF A BRIDGE CIRCUIT, THE SAID THERMISTORS BEING JUXTAPOSITIONED IN SAID CHAMBER SO AS TO BE EQUALLY AND SIMULTANEOUSLY EXPOSED TO THE SAMPLE FLOW THERETHROUGH, THE SECOND OF SAID THERMISTORS HAVING ASSOCIATED THEREWITH A QUANTITY OF A CATALYST SPECIFIC TO ACCELERATING THE DECOMPOSITION OF OZONE AT THE MAINTAINED TEMPERATURE, AND INDICATING MEANS IN SAID CIRCUIT ADAPTED TO MEASURE THE UNBALANCE OF SAID CIRCUIT DUE TO THE HEAT PRODUCED BY THE CATALYTIC DECOMPOSITION OF OZONE ON THE SAID SECOND THERMISTOR.
Claim 2
Independent Claim
163 words
AN APPARATUS FOR DETECTING AND QUANTITATIVELY INDICATING THE CONCENTRATION OF OZONE IN THE ATMOSPHERE WHICH COMPRISES IN COMBINATION A MASSIVE CASING OF INERT METAL, A CIRCUITOUS FLOW CHANNEL THROUGH SAID CASING, SAID FLOW CHANNEL DISCHARGING INTO A TEST CHAMBER ARRANGED AXIALLY OF SAID FLOW CHANNEL, MEANS FOR ESTABLISHING A FLOW OF TEST GASES THROUGH SAID CHANNEL AT A UNIFORM RATE, MEANS FOR MAINTAINING THE TEMPERATURE OF SAID CASING AT A SELECTED UNIFORM LEVEL, DETECTOR MEANS INCLUDING FIRST AND SECOND MATCHED THERMISTORS IN SEPARATE ARMS OF A BRIDGE CIRCUIT, THE SAID THERMISTORS BEING JUXTAPOSITIONED IN SAID CHAMBER SO AS TO BE EQUALLY AND SIMULTANEOUSLY EXPOSED TO THE SAMPLE FLOW THERETHROUGH, THE SECOND OF SAID THERMISTORS HAVING ASSOCIATED THEREWITH A QUANTITY OF A CATALYST SPECIFIC TO ACCELERATING THE DECOMPOSITION OF OZONE AT THE MAINTAINED TEMPERATURE, AND INDICATING MEANS IN SAID CIRCUIT ADAPTED TO MEASURE THE UNBALANCE OF SAID CIRCUIT DUE TO THE HEAT PRODUCED BY THE CATALYTIC DECOMPOSITION OF OZONE ON THE SAID SECOND THERMISTOR.
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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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |