.~ By C content reduction, e.g., cracking, etc. {3}
649
.~.~ Isobutylene product per se
DEFINITION
Classification: 585/649
Isobutylene product, per se:
(under subclass 648) Subject matter wherein isobutylene (H3C-CH3) is produced for example, by depolymerization of poly-butylene.
(1) Note. The expression, "per se", is meant to include product mixtures which contain isobutylene as a desired product and to exclude derivatives of isobutylene.
