Granted Patent
Utility
US 5,300,680 · App. 07/883,087
Process for preparing sulfonium or sulfoxonium salts of N-phosphonomethylglycine
Inventors:
Raymond Vincent Heavon Jones, Elizabeth S. C. Simpson
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: May 15, 1992
Inventors
Raymond Vincent Heavon Jones
Elizabeth S. C. Simpson
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.