Granted Patent
Utility
US 5,620,510 · App. 08/493,881
Swollen starches as papermaking additives
Inventors:
Merle J. Mentzer, Eduardo A. Piazza
Patented Case
View Patent ↗
Granted: Apr 15, 1997
Filed: Jun 23, 1995
Inventors
Merle J. Mentzer
Eduardo A. Piazza
Assignee (at issue)
CPC International, 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.