Refrigeration – Low pressure cold trap process and apparatus
62268, 55269, 417901, B01D 800
Two-stage cryogenic pumping apparatus having individual plate members with cryosorbent coatings secured by removable fasteners to permit easy assembly and replacement of the plate members. The plate members are spaced apart to provide relatively unrestricted access to the cryosorbent material for the gases to be adsorbed thereon.
patent: 2703673 (1955-03-01), Winkler
patent: 4121430 (1978-10-01), Bachler et al.
Capossela Ronald C.
Cole Stanley Z.
Herbert Leon F.
Varian Associates Inc.
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