Granted Patent
Utility
US 6,790,270 · App. 10/395,615
Protein and starch surface sizings for oil and grease resistant paper
Inventors:
Robert L. Billmers, Viotor L. Mackewicz, Ralph Trksak
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Mar 21, 2003
Inventors
Robert L. Billmers
Viotor L. Mackewicz
Ralph Trksak
Assignee (at issue)
National Starch and Chemical Investment Holding Copporation
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.