US PATENT SUBCLASS 204 / 157.7
.~.~.~.~ Hetero sulfur containing

Current as of: June, 1999
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204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

*  DD  PROCESSES AND PRODUCTS {7}
157.15  DF  .~ Processes of treating materials by wave energy {6}
157.6  DF  .~.~ Process or preparing desired organic product containing at least one atom other than carbon and hydrogen {16}
157.69  DF  .~.~.~ Heterocyclic product produced {2}
157.7.~.~.~.~ Hetero sulfur containing

DEFINITION

Classification: 204/157.7

Hetero sulfur containing:

(under subclass 157.69) Subject matter wherein there is at least one sulfur atom in the hetero ring system.