Granted Patent
Utility
US 5,811,575 · App. 08/857,318
Process for preparing vinyl-phosphonic acids
Inventors:
Hans-Jerg Kleiner, Gunter Roscher
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: May 16, 1997
Inventors
Hans-Jerg Kleiner
Gunter Roscher
Assignee (at issue)
Clariant Corporation
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.