US Patent No: 8,152,898
Number of patents in Portfolio can not be more than 2000
Helium recovery process
Stats
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Apr 10, 2012
Issued date -
Oct 1, 2009
filing date -
12/571,934
serial no -
In Force
status
Importance
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Abstract
Helium is recovered from gas streams containing high concentrations of hydrogen gas and low concentrations of helium gas, such as from the recycle stream from the production of ammonia. The inventive process provides for an integrated process for the recovery of both an enriched helium gas stream product and a high purity hydrogen gas stream product.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,185,014 Membrane oxygen process and system | 21 | 1991 | |
| 5,329,775 Cryogenic helium production system | 6 | 1992 | |
| 5,771,714 Cryogenic rectification system for producing higher purity helium | 2 | 1997 | |
| 7,294,172 Helium recovery | 4 | 2002 | |
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| 5,928,415 Selection device for providing one or the other of two gases to an apparatus | 8 | 1996 | |
| 6,669,922 Installation for the production of pure hydrogen from a gas containing helium | 2 | 2000 | |
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| 5,542,966 Helium recovery | 11 | 1994 | |
| 5,632,803 Enhanced helium recovery | 15 | 1995 | |
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| 4,425,318 Hydriding body-centered cubic phase alloys at room temperature | 12 | 1982 | |
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| 5,080,694 Process for helium recovery | 12 | 1989 | |
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| 4,360,505 Recovering hydrogen from gas stream using metal hydride | 22 | 1981 | |
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| 4,793,829 Permeation process for separating ammonia from a gas mixture | 8 | 1988 | |
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| 2005/0217,479 Helium recovery from gas streams | 4 | 2004 | |
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| 4,238,204 Selective adsorption process | 59 | 1979 | |
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| 6,179,900 Process for the separation/recovery of gases | 17 | 1998 | |
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| 5,064,446 Method of preparing high purity light gas by multiple-step gas separation | 20 | 1988 | |
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| 4,934,148 Dry, high purity nitrogen production process and system | 39 | 1989 | |
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| 4,398,926 Enhanced hydrogen recovery from low purity gas streams | 51 | 1982 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Oct 10, 2015 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Oct 10, 2019 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 10, 2023 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |