(under subclass 158) Processes and products which include a natural resin or derivative thereof.
(1) Note. Many of the patents in this subclass include rosin or rosin soap sizing for the paper. Merely stating that the paper is "sized" is insufficient to cause classification herein unless it positively appears that a natural resin is employed.
SEE OR SEARCH CLASS
106, Compositions: Coating or Plastic,
137.5, 164.41+, 166.51, 169.18+, 170.21, 178.1, and 203.3 for compositions including a natural resin or derivative thereof and cellulose which are not deposited from a liquid suspension.
