Granted Patent
Utility
US 5,631,300 · App. 08/462,164
Method of making a sustained release biocidal composition
Inventor:
Stephen T. Wellinghoff
Patented Case
View Patent ↗
Granted: May 20, 1997
Filed: Jun 5, 1995
Inventor
Stephen T. Wellinghoff
Assignee (at issue)
SOUTHWEST RESEARCH INSTITUTE
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.