Granted Patent
Utility
US 4,600,778 · App. 06/591,614
Process for the preparation of 1,4-dihydropyridinedicarboxylic esters
Inventors:
Werner Teller, Wolfgang Koebernick, Arthur Haaf, Paul Naab, Michael Preiss
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Mar 20, 1984
Inventors
Werner Teller
Wolfgang Koebernick
Arthur Haaf
Paul Naab
Michael Preiss
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.