US PATENT SUBCLASS 106 / 735
.~.~.~ Calcium sulfate specified (e.g., gypsum, anhydrite, plaster of Paris, etc.)

Current as of: June, 1999
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106 /   HD   COMPOSITIONS: COATING OR PLASTIC

*  DD  COATING OR PLASTIC COMPOSITIONS {40}
638  DF  .~ Inorganic settable ingredient containing {30}
713  DF  .~.~ Portland type cement {13}
735.~.~.~ Calcium sulfate specified (e.g., gypsum, anhydrite, plaster of Paris, etc.)

DEFINITION

Classification: 106/735

Calcium sulfate specified (e.g., gypsum, anhydrite, plaster of paris, etc.):

(under subclass 713) Subject matter wherein calcium sulfate is specifically claimed.

(1) Note. Calcium sulfate is commonly added to portland cement clinker material, per se, and is often already present in the basic cement employed in making cement compositions. This subclass is not intended to include said routine calcium sulfate containing cement compositions, but only compositions where applicant specifically recites calcium sulfate in the claimed composition.