Granted Patent
Utility
US 4,879,306 · App. 06/780,784
Composition killing or inhibiting the growth of microorganisms and the use thereof
Inventors:
Wolf-Dieter Henkels, Marion Balzer
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Sep 27, 1985
Inventors
Wolf-Dieter Henkels
Marion Balzer
Assignee (at issue)
Grace Service Chemicals GmbH
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.