US PATENT SUBCLASS 526 / 65
.~ POLYMERIZING IN TWO OR MORE PHYSICALLY DISTINCT ZONES


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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {8}
65.~ POLYMERIZING IN TWO OR MORE PHYSICALLY DISTINCT ZONES {1}
66  DF  .~.~> Adding material to polymerization zone in an incremental or sequential manner


DEFINITION

Classification: 526/65

(under subclass 1) Subject matter under Class 520, ... wherein polymerization is effected in at least two or more physically distinct zones, (e.g., regions, stages, etc.) said zones being part of a single reactor which has a plurality of such physically distinct zones or such zones may be part of separate polymerization reactors which are interconnected at some point.

(1) Note. For the most part patents herein relate to advancement of polymerizing materials from one zone to another so as to effect a progressive degree of

polymerization and which are usually advanced until the degree of polymerization is brought to the desired state.