Method of producing high-purity helium
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United States of America Patent
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N/A
Issued Date -
Dec 4, 2003
app pub date -
May 22, 2003
filing date -
May 28, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of producing high-purity helium, which contains the step of: producing high-purity helium of 99.99 mol % or higher, by a process in which crude helium having a helium concentration of 40 to 90 mol % is, at least, permeated through a separation membrane module composed of a plurality of glass hollow fiber membrane.
First Claim
Other Claims data not available
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| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| JP | A | JP2003342009 | May 28, 2002 |
International Classification(s)
- 2003 Application Filing Year
- C01B Class
- 597 Applications Filed
- 246 Patents Issued To-Date
- 41.21 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- C01B Class
- 6 % this patent is cited more than
- 22 Age