(under subclass 101) Processes wherein the bleaching is accomplished by other than chemical agents, such as, light, high frequency vibrations or other wave energy.
(1) Note. The combined use of wave energy and chemical agents is placed in this subclass and cross referenced below where there is novelty in the chemical agent.
SEE OR SEARCH THIS CLASS, SUBCLASS:
107+, for the use of electrical energy in a chemical bath for the purpose of liberating a chemical bleaching agent in gaseous or other state.
111, for processes employing ozone.
SEE OR SEARCH CLASS
250, Radiant Energy, 428, for fluent material containment support or transfer means with or without a radiation source, subclass 493.1 for radiant energy generation and radioactive sources, and subclasses 492.1+ for the irradiation of objects and materials.
