US PATENT SUBCLASS 525 / 338
.~.~.~ Chemical treating agent contains elemental hydrogen or an elemental hydrogen-liberating compound, e.g., hydrogenation, etc.

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
55  DF  .~.~ At least one solid polymer derived from ethylenic reactants only {25}
338.~.~.~ Chemical treating agent contains elemental hydrogen or an elemental hydrogen-liberating compound, e.g., hydrogenation, etc. {1}
339  DF  .~.~.~.~> Treating in the presence of an elemental metal or inorganic metallic compound

DEFINITION

Classification: 525/338

Chemical treating agent contains elemental hydrogen or an elemental hydrogen-liberating compound, e.g., hydrogenation, etc.:

Subject matter under subclas 55 wherein the chemical treating is performed in the presence of hydrogen or in the presence of a hydrogen liberating compound, e.g., hydrogenating, etc.

(1) Note. The hydrogen liberating compound must under the anticipated process conditions, liberate elemental hydrogen.

(2) Note. The ionization of hydrogen containing materials is not considered as being an elemental hydrogen liberating

process and such compounds are therefore classified elsewhere in the schedule.