Granted Patent
Utility
US 4,554,021 · App. 06/383,253
Preparation of a cationic starch paste
Inventors:
Richard D. Harvey, E. Daniel Hubbard, Robert A. Meintrup
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: May 28, 1982
Inventors
Richard D. Harvey
E. Daniel Hubbard
Robert A. Meintrup
Assignee (at issue)
Grain Processing Corporation
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.