Granted Patent
Utility
US 5,650,446 · App. 08/465,358
Sustained release biocidal composition
Inventors:
Stephen T. Wellinghoff, Joel J. Kampa
Patented Case
View Patent ↗
Granted: Jul 22, 1997
Filed: Jun 5, 1995
Inventors
Stephen T. Wellinghoff
Joel J. Kampa
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.