US PATENT SUBCLASS 208 / 434
.~.~ Additive is petroleum or fraction from petroleum refining

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}
428  DF  .~ Including contact with extraneous additive other than hydrogen, e.g., solvent, etc. {7}
434.~.~ Additive is petroleum or fraction from petroleum refining

DEFINITION

Classification: 208/434

Additive is petroleum or fraction from petroleum refining:

(under subclass 428) Subject matter wherein crude or refined mineral oil from an outside source is mixed with the solid feed to the process or with an intermediate or product derived from the solid feed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

415+, for contact of the feed with a fraction from its own refining.