Patent US3213747A successfully refreshed from Google Patents.
US3213747A
Expired / Lapsed
US
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Process for detecting phosphorous and/or sulphur in a gas
Assignee: Individual
•
Filing: 1962-01-10
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Granted: 1965-10-26
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Expires: 1982-01-10
Abstract
No abstract record available.
Inventors
- 👤 Smissen Carl Ernst Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:52
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/72; Y; Y10; Y10T; Y10T436/00; Y10T436/16; Y10T436/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A PROCESS FOR DETECTING AN QUANTIATIVELY DETERMINING THE PRESENCE OF PHOSPHORUS AND SULPHUR COMPOUNDS IN A GAS CONTAINING NO OXYGEN COMPRISING MIXING THE GAS WITH HYDROGEN AND OXYGEN WITH THE AMOUNT OF HYDROGEN BEING IN EXCESS OF THAT REQUIRED FOR THE COMPLETE REACTION OF THE OXYGEN AND BURNING THE MIXTURE OF GAS, OXYGEN AND HYDROGEN FOR FORMING A GREEN COLOR INDIATIVE OF THE PRESENCE OF PHOSPHORUS A D MEASURABLE BY MEANS OF A SPECTROPHOTOMETER, AND FOR FORMING A FLUE COLOR INDICATIVE OF THE PRESENCE OF SULPHUR AND MEASURABLE BY MEANS OF A SPECTROPHOTOMETER.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |