US2930201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of oxygen of low argon content
Assignee: Linde GmbH
•
Filing: 1954-08-23
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Granted: 1960-03-29
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Expires: 1974-08-23
Abstract
No abstract record available.
Inventors
- 👤 Karwat Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:11
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04406; F25J3/04412; F25J2215/00; F25J2215/50; F25J2215/56; F25J2220/00; F25J2220/50; F25J2245/00; F25J2245/42; Y; Y10; Y10S; Y10S62/00; Y10S62/923; Y10S62/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR THE PRODUCTION OF OXYGEN HAVING A GAS RESIDUE CONSISTING MAINLY OF NITROGEN WITH ONLY A SMALL ADMIXTURE OF ARGON, COMPRISING THE STEPS FO FEEDING LIQUID AIR TO A RECTIFYING COLUMN, SEPARATING IN A FIRST PORTION OF SAID COLUMN A FRACTION WHICH IS RICH IN OXYGEN AND LOW IN NITROGEN, SEPARATING IN A SECOND PORTION OF SAID COLUMN A FRACTION CONSISTING OF NITROGEN, FEEDING A PORTION OF SAID SEPARATED NITROGEN TO THE ZONE OF SAID FIRST PORTION IN WHICH THE LAST STAGES OF CONCENTRATION OF SAID OXYGEN RICH FRACTION TAKES PLACE AND REMOVING FROM SAID ZONE SAID OXYGEN RICH FRACTION WHICH IS LOW IN NITROGEN CONTENT AND LOWER STILL IN ARGON CONTENT
Claim 2
Dependent Claim
114 words
A PROCESS FOR THE PRODUCTION OF OXYGEN HAVING A GAS RESIDUE CONSISTING MAINLY OF NITROGEN WITH ONLY A SMALL ADMIXTURE OF ARGON, COMPRISING THE STEPS FO FEEDING LIQUID AIR TO A RECTIFYING COLUMN, SEPARATING IN A FIRST PORTION OF SAID COLUMN A FRACTION WHICH IS RICH IN OXYGEN AND LOW IN NITROGEN, SEPARATING IN A SECOND PORTION OF SAID COLUMN A FRACTION CONSISTING OF NITROGEN, FEEDING A PORTION OF SAID SEPARATED NITROGEN TO THE ZONE OF SAID FIRST PORTION IN WHICH THE LAST STAGES OF CONCENTRATION OF SAID OXYGEN RICH FRACTION TAKES PLACE AND REMOVING FROM SAID ZONE SAID OXYGEN RICH FRACTION WHICH IS LOW IN NITROGEN CONTENT AND LOWER STILL IN ARGON CONTENT
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |