Granted Patent
Utility
US 4,827,596 · App. 07/088,426
Plastic coating process for pipe couplings
Inventor:
Kenneth E. Rakieski
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Aug 24, 1987
Inventor
Kenneth E. Rakieski
Assignee (at issue)
Dresser Industries, 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.