Granted Patent
Utility
US 5,182,401 · App. 07/694,692
Preparation of 3-amino-2-(het)aroyl-acrylic acid derivatives
Inventor:
Klaus Grohe
Patented Case
View Patent ↗
Granted: Jan 26, 1993
Filed: May 2, 1991
Inventor
Klaus Grohe
Assignee (at issue)
Bayer Aktiengesellschaft
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.