US PATENT SUBCLASS 528 / 385
.~.~.~.~.~ Material is free oxygen, peroxide, air, or ozone

Current as of: June, 1999
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528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
373  DF  .~ FROM SULFUR-CONTAINING REACTANT {5}
381  DF  .~.~ From inorganic sulfur-containing reactant {4}
382  DF  .~.~.~ Sulfur dioxide is a reactant {2}
383  DF  .~.~.~.~ Polymerizing in the presence of a specified material other than a reactant {2}
385.~.~.~.~.~ Material is free oxygen, peroxide, air, or ozone

DEFINITION

Classification: 528/385

(under subclass 383) Subject matter wherein the specified material contains a peroxide, free oxygen, air or ozone.

(1) Note. A peroxide denotes a compound containing an -O-O- group.

(2) Note. This subclass does not include the use of air as a blanket or carrier gas.