Granted Patent
Utility
US 5,888,626 · App. 08/791,447
Plain surface acoustical product and coating therefor
Inventor:
Darryl L. Sensenig
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Jan 27, 1997
Inventor
Darryl L. Sensenig
Assignee (at issue)
ARMSTRONG WORLD 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.