patent yellow

A pigment prepared by fusing litharge and common salt, and afterward wash ing out the soda; or, by mixing common salt and litharge together in a moist state. If this mixture is allowed to rest, a chemical change takes place; the soda is then washed out, and the compound formed; it is afterward fused and powdered. Also called Turner's yellow or Montpellier-yellow. păt-ent, v. t. [PATENT, a.] To grant by patent; to secure by patent; to make the subject of a pat ent.