Granted Patent
Utility
US 4,950,671 · App. 07/321,028
Substituted 2-propenyl derivatives of pyridine
Inventors:
Hoi K. Lai, Robert A. Davis
Patented Case
View Patent ↗
Granted: Aug 21, 1990
Filed: Mar 9, 1989
Inventors
Hoi K. Lai
Robert A. Davis
Assignees (at issue)
Uniroyal Chemical Company, Inc.
Uniroyal Chemical Ltd./Ltee
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.