US3300282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for hydrogen sulfide determination
Assignee: BC Research (Canada)
•
Filing: 1963-09-16
•
Granted: 1967-01-24
•
Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 James B Risk
- 👤 Francis E Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:31
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/33; Y; Y10; Y10T; Y10T436/00; Y10T436/18; Y10T436/182; Y10T436/184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD FOR THE CONTINUOUS DETERMINATION OF THE PROPORTION OF HYDROGEN SULFIDE CONTAINED IN A STACK GAS CONTAINING HYDROGEN SULFIDE AND SULFUR DIOXIDE, WHICH COMPRISES REMOVING ANY SOLIDS FROM THE STACK GAS, DILUTING SAID STACK GAS WITH AIR, DIVIDING THE STREAM OF THE AIR-GAS MIXTURE INTO A FIRST AND SECOND STREAM, SUBJECTING SAID FIRST STREAM TO CATALYTIC OXIDATION IN A FURNACE TO CONVERT THE HYDROGEN SULFIDE TO SULFUR DIOXIDE, IRRADIATING SAID OXIDIZED FIRST STREAM WITH ULTRAVIOLET LIGHT AT A WAVELENGTH OF APPROXIMATELY 2850 A. AND MEASURING THE AMOUNT OF RADIATION ABSORBED, IRRADIATING SAID SECOND STREAM WITH THE SAME ULTRAVIOLET LIGHT AND MEASURING THE AMOUNT OF RADIATION ABSORBED BY SAID SECOND STREAM, AND DETERMINING THE CONCENTRATION OF HYDROGEN SULFIDE IN SAID GAS FROM THE
Claim 2
Independent Claim
123 words
A METHOD FOR THE CONTINUOUS DETERMINATION OF THE PROPORTION OF HYDROGEN SULFIDE CONTAINED IN A STACK GAS CONTAINING HYDROGEN SULFIDE AND SULFUR DIOXIDE, WHICH COMPRISES REMOVING ANY SOLIDS FROM THE STACK GAS, DILUTING SAID STACK GAS WITH AIR, DIVIDING THE STREAM OF THE AIR-GAS MIXTURE INTO A FIRST AND SECOND STREAM, SUBJECTING SAID FIRST STREAM TO CATALYTIC OXIDATION IN A FURNACE TO CONVERT THE HYDROGEN SULFIDE TO SULFUR DIOXIDE, IRRADIATING SAID OXIDIZED FIRST STREAM WITH ULTRAVIOLET LIGHT AT A WAVELENGTH OF APPROXIMATELY 2850 A. AND MEASURING THE AMOUNT OF RADIATION ABSORBED, IRRADIATING SAID SECOND STREAM WITH THE SAME ULTRAVIOLET LIGHT AND MEASURING THE AMOUNT OF RADIATION ABSORBED BY SAID SECOND STREAM, AND DETERMINING THE CONCENTRATION OF HYDROGEN SULFIDE IN SAID GAS FROM THE
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |