US PATENT SUBCLASS 518 / 721
.~.~ The catalyst contains a metal in addition to the iron, or another material utilized contains a metal other than iron (e.g., as a promoter, retarder, etc.)

Current as of: June, 1999
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518 /   HD   CHEMISTRY: FISCHER-TROPSCH PROCESSES; OR PURIFICATION OR RECOVERY OF PRODUCTS THEREOF

715  DF  GROUP VIII METAL CONTAINING CATALYST UTILIZED FOR THE FISCHER-TROPSCH REACTION (i.e., Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, or Pt) {3}
719  DF  .~ Iron containing catalyst {2}
721.~.~ The catalyst contains a metal in addition to the iron, or another material utilized contains a metal other than iron (e.g., as a promoter, retarder, etc.)

DEFINITION

Classification: 518/721

The catalyst contains a metal in addition to the iron, or another material utilized contains a metal other than iron (e.g., as a promoter, retarder, etc.):

(under subclass 719) Processes wherein a metal, in addition to the iron, is utilized in any form, e.g., as part of the catalyst, in a promoter or retarder, etc.