Granted Patent
Utility
US 5,420,188 · App. 07/999,023
Internal mold release agent for use in reaction injection molding
Inventor:
John E. Dewhurst
Patented Case
View Patent ↗
Granted: May 30, 1995
Filed: Dec 31, 1992
Inventor
John E. Dewhurst
Assignee (at issue)
Miles Inc.
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.