US PATENT SUBCLASS 526 / 66
.~.~ Adding material to polymerization zone in an incremental or sequential manner

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  DF  .~ POLYMERIZING IN TWO OR MORE PHYSICALLY DISTINCT ZONES {1}
66.~.~ Adding material to polymerization zone in an incremental or sequential manner

DEFINITION

Classification: 526/66

(under subclass 65) Subject matter wherein material (e.g., monomer, catalyst, etc.) is added to a zone containing polymerizable material therein, said polymerizable material being in a state undergoing active polymerization and wherein said material is added in a sequential or incremental manner.

(1) Note. "Sequential or incremental" addition requires (1) the addition of material involving a halting, interruption, or pausing in the addition of the same material followed by a resumption of addition; or (2) the addition of materials to a polymerization zone followed by the addition of materials distinct from the previous material, or (3) the addition of disproportionate amounts of materials so that the addition of one is completed prior to the completion of the addition of the other material.