Granted Patent
Utility
US 5,888,467 · App. 08/956,504
Amorphous precipitated silica characterized by high dispersion in cured organic rubber compositions
Inventors:
Harold E. Swift, Thomas G. Krivak, Laurence E. Jones
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Oct 23, 1997
Inventors
Harold E. Swift
Thomas G. Krivak
Laurence E. Jones
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.