Granted Patent
Utility
US 5,494,555 · App. 08/440,245
Method of modifying the opacity of paper and paper produced therefrom
Inventors:
Louis R. Dragner, Bernard F. North
Patented Case
View Patent ↗
Granted: Feb 27, 1996
Filed: May 12, 1995
Inventors
Louis R. Dragner
Bernard F. North
Assignee (at issue)
Sequa Chemicals, 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.