Granted Patent
Utility
US 6,284,351 · App. 09/275,101
Plain surface acoustical product and coating therefor
Inventor:
Darryl L. Sensenig
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Mar 24, 1999
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.