Granted Patent
Utility
US 5,401,809 · App. 08/162,832
Polymer ammonium borates and processes for their preparation
Inventors:
Jorg Gitzel, Detlef Wehle, Hans-Tobias Macholdt
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Dec 3, 1993
Inventors
Jorg Gitzel
Detlef Wehle
Hans-Tobias Macholdt
Assignee (at issue)
Hoechst 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.