Granted Patent
Utility
US 5,728,898 · App. 08/690,371
Process for making water-soluble derivatives of quinones
Inventor:
Mark Harry Krackov
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Jun 27, 1996
Inventor
Mark Harry Krackov
Assignee (at issue)
Bio-Technical Resources
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.