US PATENT SUBCLASS 208 / 5
.~.~ In presence of soild contact material

Current as of: June, 1999
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208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

3  DF  OXIDATION OF MINERAL OILS {2}
4  DF  .~ To form asphalts, tars or pitches {2}
5.~.~ In presence of soild contact material

DEFINITION

Classification: 208/5

(under subclass 4) Processes wherein the oxidation is carried out in the presence of a solid contact material, e.g., a catalyst.