Granted Patent
Utility
US 4,396,567 · App. 06/269,513
Method for blow molding with active ingredient in blowing gas
Inventor:
Dewey Rainville
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Jun 1, 1981
Inventor
Dewey Rainville
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.