US PATENT SUBCLASS 423 / 578.2
.~.~.~ From ore

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

511  DF  SULFUR OR COMPOUND THEREOF {4}
567.1  DF  .~ Elemental sulfur {5}
578.1  DF  .~.~ Purifying crude sulfur {1}
578.2.~.~.~ From ore

DEFINITION

Classification: 423/578.2

From ore:

(under subclass 578.1) Products or processes wherein the crude sulfur is obtained from a natural mineral found mixed with earthy matter.