502 / | HD | CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING |
527.14 | DF | SPECIFIED SUPPORT PARTICLES OF PECULIAR STRUCTURE OR PHYSICAL FORM (E.G., WHISKERS, FIBER PIECES, ETC.) {3} |
527.15 | .~ Layered deposition on support particle (i.e., on a carrier particle) |