US PATENT SUBCLASS 416 / 1
METHOD OF OPERATION


Current as of: June, 1999
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416 /   HD   FLUID REACTION SURFACES (I.E., IMPELLERS)

1METHOD OF OPERATION


DEFINITION

Classification: 416/1

(under the class definition) Method including a step relating to the operation or use of impeller* structure.

(1) Note. This class does not provide for a claim relating to apparatus for manufacture or process of manufacture of an impeller. Where a product of manufacture (i.e., impeller) claim and either or both an apparatus for manufacture claim or process of manufacture claim are contained in the same patent, the patent will be classified here in the appropriate article subclass and cross-referenced to the appropriate fabricating class.

SEE OR SEARCH CLASS

29, Metal Working,

23.51, and 889+ for apparatus and processes, respectively, for making impellers methods for making impellers.