US PATENT SUBCLASS 208 / 4
.~ To form asphalts, tars or pitches

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

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

DEFINITION

Classification: 208/4

(under subclass 3) Processes for producing asphalts, tars or pitches by oxidation of mineral oils and products of such processes.