Granted Patent
Utility
US 4,788,239 · App. 06/894,930
Water-based neoprene contact cement comprising ionizable resin mixture in a copolymer of chloroprene and methacrylic acid
Inventor:
Wei-Tun Chang
Patented Case
View Patent ↗
Granted: Nov 29, 1988
Filed: Aug 8, 1986
Inventor
Wei-Tun Chang
Assignee (at issue)
Beecham Home Improvements Products 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.