US PATENT SUBCLASS 423 / 441
.~.~ Calcium containing

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

Internet Version by PATENTEC © 1999      Terms of Use


423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

414  DF  CARBON OR COMPOUND THEREOF {3}
439  DF  .~ Binary compound (e.g., carbide, etc.) {3}
441.~.~ Calcium containing {1}
442  DF  .~.~.~> By reacting carbon and inorganic calcium containing compound

DEFINITION

Classification: 423/441

(under subclass 439) Products or processes wherein the other element is calcium.