US PATENT SUBCLASS 208 / 422
.~.~.~ And Group VIII metal

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

400  DF  BY TREATMENT OF SOLID MINERAL, E.G., COAL LIQUEFACTION, ETC. {13}
419  DF  .~ Using specifically added catalyst during hydrogenation {3}
421  DF  .~.~ Containing Group VI transition metal {1}
422.~.~.~ And Group VIII metal

DEFINITION

Classification: 208/422

And Group VIII metal:

(under subclass 421) Subject matter in which the catalyst contains one or more of cobalt, iron or nickel, or a platinum group metal, in free or combined form, in addition to the Group VI transition metal.