US PATENT SUBCLASS 106 / 761
.~.~.~.~ Recycling exhaust gas, reusing heat from process, or purifying exhaust gas

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}
739  DF  .~.~.~ Portland type cement per se (e.g., clinker preparation, etc.) {26}
761.~.~.~.~ Recycling exhaust gas, reusing heat from process, or purifying exhaust gas {1}
762  DF  .~.~.~.~.~> Processing of exhaust gas prior to recycling (e.g., purifying, separating constituents, etc.)

DEFINITION

Classification: 106/761

Recycling exhaust gas, reusing heat from process, or purifying exhaust gas:

(under subclass 739) Subject matter involving recycling of exhaust gas, reusing heat from process, or purifying exhaust gas.

(1) Note. Recycling of reheated cooling gas, used to cool clinker, is classified in subclass 750 of this class.