Granted Patent
Utility
US 4,808,604 · App. 07/058,699
N-(substituted phenyl) tetrazol-5-yl carboxamides and anti-allergic use thereof
Inventors:
Andreas Beck, Alfred Sallmann, Paul Wenk
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Jun 1, 1987
Inventors
Andreas Beck
Alfred Sallmann
Paul Wenk
Assignee (at issue)
Ciba-Geigy
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.