Granted Patent
Utility
US 5,489,715 · App. 08/334,716
Process for preparing 4,5-difluorobenzaldehydes
Inventor:
Albrecht Marhold
Patented Case
View Patent ↗
Granted: Feb 6, 1996
Filed: Nov 4, 1994
Inventor
Albrecht Marhold
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.