Granted Patent
Utility
US 4,378,430 · App. 06/215,622
Method of forming stabilized urease solutions
Inventor:
Ivan E. Modrovich
Patented Case
View Patent ↗
Granted: Mar 29, 1983
Filed: Dec 12, 1980
Inventor
Ivan E. Modrovich
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.