Granted Patent
Utility
US 4,804,475 · App. 07/047,241
Metallized membrane systems
Inventors:
Kirkor Sirinyan, Karlheinz Hildenbrand, Ulrich von Gizycki, Rudolf Merten, Hermann Perrey, Gerhard D. Wolf
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: May 7, 1987
Inventors
Kirkor Sirinyan
Karlheinz Hildenbrand
Ulrich von Gizycki
Rudolf Merten
Hermann Perrey
Gerhard D. Wolf
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.