Granted Patent
Utility
US 4,839,447 · App. 07/223,092
Polymerization of chloroprene
Inventors:
Rudolf Casper, Peter Wendling, Wolfgang Konter, Gerhard Hohmann
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Jul 22, 1988
Inventors
Rudolf Casper
Peter Wendling
Wolfgang Konter
Gerhard Hohmann
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.