US PATENT SUBCLASS 501 / 83
.~.~.~.~ Of cellulosic material

Current as of: June, 1999
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501 /   HD   COMPOSITIONS: CERAMIC

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

DEFINITION

Classification: 501/83

Of cellulosic material:

(under subclass 82) Subject matter in which the combustible material contains cellulose or a reaction product thereof.

(1) Note. Such material may be, e.g., cork, wood, sawdust, nutshells, bark, straw, chaff, collodion, etc.