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1 result for “page 2 of 7” · 1990ms

Patent

US3067131 Periodic introduction of granular contact material into high pressure vessel

Cited prior art · Eric V Bergstrom · Socony Mobil Oil Co Inc · United States · 1962

75 end of the conduit 21. The cycle is reversed before the Page 7 hopper 12 is emptied of contact material and the level gas, in passing through the column of