US3153577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ozone analyzer
Assignee: MSA Safety Inc
•
Filing: 1962-04-02
•
Granted: 1964-10-20
•
Expires: 1982-04-02
Abstract
No abstract record available.
Inventors
- 👤 Charles R Mccully
- 👤 James N Van Scoyoc
- 👤 Joseph F Roesler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:42
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
89 words
AN APPARATUS FOR DETERMINING OZONE CONCNETRATION IN THE ATMOSPHERE COMPRISING A HOUSING MEANS FORMING A CHAMBER; A FIRST AND SECOND FLOW CHANNEL WITHIN THE CHAMBER, THE FIRST FLOW CHANNEL HAVING ASSOCIATED THEREWITH A CATALYST SPECIFIC FOR ACCELERATING THE DECOMPOSITION OF OZONE; MEANS PROVIDING A SUBSTANTIALLY EQUAL VELOCITY FLOW OF TEST GAS THROUGH THE FIRST AND SECOND FLOW CHANNEL; DETECTOR MEANS INCLUDING A THERMISTOR IN AN ARM OF A D.C. BRIDGE CIRCUIT; MEANS TO ALTERNATELY CONTACT THE THERMISTOR WITH THE TEST GAS EFFLUENT FROM EACH FLOW CHANNEL TO GENERATE AN
Claim 2
Independent Claim
89 words
AN APPARATUS FOR DETERMINING OZONE CONCNETRATION IN THE ATMOSPHERE COMPRISING A HOUSING MEANS FORMING A CHAMBER; A FIRST AND SECOND FLOW CHANNEL WITHIN THE CHAMBER, THE FIRST FLOW CHANNEL HAVING ASSOCIATED THEREWITH A CATALYST SPECIFIC FOR ACCELERATING THE DECOMPOSITION OF OZONE; MEANS PROVIDING A SUBSTANTIALLY EQUAL VELOCITY FLOW OF TEST GAS THROUGH THE FIRST AND SECOND FLOW CHANNEL; DETECTOR MEANS INCLUDING A THERMISTOR IN AN ARM OF A D.C. BRIDGE CIRCUIT; MEANS TO ALTERNATELY CONTACT THE THERMISTOR WITH THE TEST GAS EFFLUENT FROM EACH FLOW CHANNEL TO GENERATE AN
References Cited (Backward Citations)
US2899281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |