526 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
* | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {8} |
59 | .~ EFFECTING A CHANGE IN A POLYMERIZATION PROCESS IN RESPONSE TO A MEASUREMENT OR TEST {2} | |
60 | DF | .~.~> Change responsive to composition property other than density |
61 | DF | .~.~> Change responsive to pressure or temperature |