Number | Name | Date | Kind |
---|---|---|---|
3807185 | Forg et al. | Apr 1974 | |
4238211 | Stuart | Dec 1980 | |
4666481 | Olson, Jr. | May 1987 | |
4701200 | Fisher et al. | Oct 1987 | |
4701201 | Hanson et al. | Oct 1987 | |
5329775 | Fiedler et al. | Jul 1994 | |
5339641 | Mathis et al. | Aug 1994 |
Entry |
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Rathmann et al., Linde Reports on Science and Technology No. 34, 1982. |
Pahade et al., Thermal Integrated of Processes to Recover Helium, Energy Process, vol. 8, No. 4, Dec., 1988 pp. 196-200. |
Handley et al., Process Requirements and Enhanced Economics of Helium Recovery from Natural Gas, Soc. of Petroleum Engineers SPE 24292, Apr. 13, 1992 pp. 11-20. |