US PATENT SUBCLASS 208 / 41
.~ By distillation
Current as of:
June, 1999
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208 /
HD
MINERAL OILS: PROCESSES AND PRODUCTS
39
DF
ASPHALTS, TARS, PITCHES AND RESINS; MAKING, TREATING AND RECOVERY
{4}
41
.~ By distillation {1}
42
DF
.~.~
> Tar feed {1}
DEFINITION
Classification: 208/41
(under subclass 39) Processes wherein asphalt, tar, pitch or resin is obtained by a distillation of an oil feed under nonconversion conditions.
SEE OR SEARCH CLASS
201, Distillation: Processes, Thermolytic, appropriate subclasses, for a thermolytic distillation process producing tar, pitch or resin.
202, Distillation: Apparatus, appropriate subclass, for apparatus for distillation.
203, Distillation: Processes, Separatory, appropriate subclasses, for a process of distilling a liquid under nonconversion conditions.
