Granted Patent
Utility
US 4,977,270 · App. 07/278,708
Substituted 2,4-dioxodiazolidines and -thiadiazolidines and their use as herbicides
Inventor:
Siok H. H. Wee
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Dec 1, 1988
Inventor
Siok H. H. Wee
Assignee (at issue)
ICI Americas, Inc.
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.