Granted Patent
Utility
US 4,567,228 · App. 06/612,207
Aqueous dispersion, internally silylated and dispersed polyurethane resins, and surfaces containing same
Inventors:
Peter C. Gaa, David E. Dana
Patented Case
View Patent ↗
Granted: Jan 28, 1986
Filed: May 21, 1984
Inventors
Peter C. Gaa
David E. Dana
Assignee (at issue)
PPG 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.