(under subclass 35) Methods involving subjecting the material to a change in temperature.
SEE OR SEARCH CLASS
65, Glass Manufacturing,
69, for a process of forming a hollow glass article in a mold cavity combined with the step of annealing or tempering.
72, Metal Deforming, appropriate subclasses, for a plastic metal shaping method including such heating or cooling as is required merely to maintain or establish a working or an ambient temperature.
148, Metal Treatment, appropriate subclass, for combined processes of pressing and heat treating metal.
419, Powder Metallurgy Processes, appropriate subclasses, for processes of making articles from particulate material containing metal particles including pressure with or without heat. 554, Organic Compounds,
23, for processes directed to or including the melting out of fats, oils or waxes from animal or vegetable matter by heat, where no significant pressing is claimed.
