US2806767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing oxygen from mixtures of hydrogen and nitrogen
Assignee: Universal Oil Products Co
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Filing: 1953-08-27
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Granted: 1957-09-17
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Expires: 1973-08-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Chenicek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:21
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/50; C01B3/52; C01B3/02; C01B3/025; C01B2203/00; C01B2203/04; C01B2203/0415; C01B2203/0465
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN THE SYNTHESIS OF AMMONIA FROM A MIXTURE OF HYDROGEN AND NITROGEN CONTAINING OXYGEN AS AN IMPURITY, THE METHOD OF PURIFYING SAID MIXTURE PRIOR TO THE AMMONIA SYTHESIS WHICH COMPRISES CONTACTING THE SAME WITH LIQUID HYDROZINE, THEREBY REMOVING OXYGEN FROM AND ADDING NITROGEN TO THE GAS MIXTURE, AND SEPERATING THE LATTER FROM THE LIQUID.
Claim 2
Dependent Claim
54 words
IN THE SYNTHESIS OF AMMONIA FROM A MIXTURE OF HYDROGEN AND NITROGEN CONTAINING OXYGEN AS AN IMPURITY, THE METHOD OF PURIFYING SAID MIXTURE PRIOR TO THE AMMONIA SYTHESIS WHICH COMPRISES CONTACTING THE SAME WITH LIQUID HYDROZINE, THEREBY REMOVING OXYGEN FROM AND ADDING NITROGEN TO THE GAS MIXTURE, AND SEPERATING THE LATTER FROM THE LIQUID.
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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |