US3695841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purifying hydrogen
Assignee: Individual
•
Filing: 1970-07-29
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Granted: 1972-10-03
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Expires: 1990-07-29
Abstract
Abstract HYDROGEN WHICH HAS BEEN OBTAINED IN THE DEHYDROGENATION OF HYDROCARBONS OR THEIR DERIVATIVES IS PURIFIED BY PASSING IT AT ELEVATED TEMPERATUE OVER A SUPPORTED CATALYST WHICH CONTAINS AS THE ACTIVE INGREDIENT NICKEL AND AS THE CARRIER ALUMINUM OXIDE, MAGNESIUM OXIDE OR A MIXTURE OF THE TWO.
Inventors
- 👤 Guenter Zirker
- 👤 Walter Sanne
- 👤 Kurt Pilch
- 👤 Gerhard Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:56
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/50; C01B3/56; C01B3/58; C01B2203/00; C01B2203/04; C01B2203/0435; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |