Granted Patent
Utility
US 4,869,643 · App. 06/518,676
Pump housing, mould parts of a mould wall for a pump housing and method of manufacturing a pump housing
Inventor:
Gerrit de Vries
Patented Case
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Granted: Sep 26, 1989
Filed: Jul 29, 1983
Inventor
Gerrit de Vries
Assignee (at issue)
501 Stork Pompen B.V.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.