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US2537448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purifying gases
Assignee: Shell Development Co
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Filing: 1947-04-22
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Granted: 1951-01-09
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Expires: 1967-04-22
Abstract
No abstract record available.
Inventors
- 👤 Engel Willem Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:13
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE PROCESS OF REMOVING ORGANICALLY COMBINED CHLORINE FROM NORMALLY GASEOUS MATERIALS OF RELATIVELY HIGH THERMAL STABILITY COMPRISING CARBON MONOXIDE AND HYDROGEN WHICH COMPRISES CONTACTING SAID NORMALLY GASEOUS MATERIALS AT A TEMPERATURE ABOVE ABOUT 475* C. BUT BELOW THE TEMPERATURE AT WHICH ANY SUBSTANTIAL ALTERATION IN COMPOSITION OF SAID NORMALLY GASEOUS MATERIALS IS BROUGHT ABOUT, WITH A CATALYST CONSISTING ESSENTIALLY OF ACTIVE CARBON IN COMBINATION WITH POTASSIUM HYDROXIDE THEREBY RETAINING SAID CHLORINE IN SAID CATALYST AND RECOVERING SAID NORMALLY GASEOUS MATERIALS FREE OF ANY SUBSTANTIAL AMOUNT OF SAID CHLORINE.
Claim 2
Dependent Claim
88 words
THE PROCESS OF REMOVING ORGANICALLY COMBINED CHLORINE FROM NORMALLY GASEOUS MATERIALS OF RELATIVELY HIGH THERMAL STABILITY COMPRISING CARBON MONOXIDE AND HYDROGEN WHICH COMPRISES CONTACTING SAID NORMALLY GASEOUS MATERIALS AT A TEMPERATURE ABOVE ABOUT 475* C. BUT BELOW THE TEMPERATURE AT WHICH ANY SUBSTANTIAL ALTERATION IN COMPOSITION OF SAID NORMALLY GASEOUS MATERIALS IS BROUGHT ABOUT, WITH A CATALYST CONSISTING ESSENTIALLY OF ACTIVE CARBON IN COMBINATION WITH POTASSIUM HYDROXIDE THEREBY RETAINING SAID CHLORINE IN SAID CATALYST AND RECOVERING SAID NORMALLY GASEOUS MATERIALS FREE OF ANY SUBSTANTIAL AMOUNT OF SAID CHLORINE.
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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |