Granted Patent
Utility
US 4,626,567 · App. 06/791,330
Water-resistant clear and colored acrylic latex sealant
Inventor:
Wei-Tun Chang
Patented Case
View Patent ↗
Granted: Dec 2, 1986
Filed: Oct 25, 1985
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.