(under subclass 1) Processes combined with a step of sampling, or chemically or physically determining some property or characteristic of the fibers or treating fluid.
(1) Note. The testing, etc., may be performed on fibers or treating fluid without disturbing their normal flow, or upon a sample extracted from such flow.
(2) Note. Processes which are carried out at specified temperatures, pressures, or "until acid", for example, are not classified in this subclass even though a test or measurement might be necessary to determine the temperature.
SEE OR SEARCH THIS CLASS, SUBCLASS:
198, for processes of chemically or physically determining some property or characteristic of fibers combined with a paper making operation.
SEE OR SEARCH CLASS
65, Glass Manufacturing, 377+, for a glassworking and/or treating process including a step of testing or inspecting.
73, Measuring and Testing, especially
53.03+, for testing physical properties of pulp not combined with fiber digestion.
436, Chemistry: Analytical and Immunological Testing, for processes of chemical testing of fibers or digestion fluid not combined with fiber digestion.
