Granted Patent
Utility
US 4,589,831 · App. 06/702,906
Removable mold segments for rotary molds
Inventor:
Ralph W. Weggel
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Feb 19, 1985
Inventor
Ralph W. Weggel
Assignee (at issue)
Berwind Corporation
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.