US PATENT SUBCLASS 501 / 81
.~.~ By use of organic combustible material

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

Internet Version by PATENTEC © 1999      Terms of Use


501 /   HD   COMPOSITIONS: CERAMIC

1  DF  CERAMIC COMPOSITIONS {15}
80  DF  .~ Pore-forming {3}
81.~.~ By use of organic combustible material {1}
82  DF  .~.~.~> Of resin or vegetable origin material {1}

DEFINITION

Classification: 501/81

By use of organic combustible material:

(under subclass 80) Subject matter wherein the porosity results from combustion of an organic combustible material, e.g., hair, tar, pitch, etc.