US PATENT SUBCLASS 208 / 34
.~.~.~ With deasphalting treatment

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

24  DF  PARAFFIN WAX; TREATMENT OR RECOVERY {4}
28  DF  .~ Separation of paraffin from oil (e.g., dewaxing) {4}
33  DF  .~.~ Solvent dewaxing {3}
34.~.~.~ With deasphalting treatment

DEFINITION

Classification: 208/34

(under subclass 33) Processes combined with a step of separating asphalt.

SEE OR SEARCH THIS CLASS, SUBCLASS:

45, for solvent treatment of mineral oils to recover the asphalt therefrom as a product.

309, for treatments of mineral oils to remove asphalt therefrom which is regarded as an undesirable component thereof and no steps to recover or use the asphalt are included.