Granted Patent
Utility
US 5,164,396 · App. 07/693,863
Barbituric acid derivatives having insecticidal activity
Inventors:
Arnoldus C. Grosscurt, Jan-Willem Terpstra
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: May 1, 1991
Inventors
Arnoldus C. Grosscurt
Jan-Willem Terpstra
Assignee (at issue)
Duphar International Research B.V.
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.