Granted Patent
Utility
US 4,788,269 · App. 07/141,452
Polyurethane coatings for bridge deckings and the like
Inventors:
Cung Vu, Susan P. Buxbaum, Norman Blank, Richard C. Hartwig
Patented Case
View Patent ↗
Granted: Nov 29, 1988
Filed: Jan 7, 1988
Inventors
Cung Vu
Susan P. Buxbaum
Norman Blank
Richard C. Hartwig
Assignee (at issue)
W.R. Grace & Co. Conn.
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.