Granted Patent
Utility
US 5,859,169 · App. 08/925,378
Urethane-modified novolaks for increasing the steel cord adhesion and rigidity of vulcanized rubber blends
Inventors:
Thomas Burkhart, Siegfried Wallenwein, Gerhard Brindoepke, Gerd Walz
Patented Case
View Patent ↗
Granted: Jan 12, 1999
Filed: Sep 8, 1997
Inventors
Thomas Burkhart
Siegfried Wallenwein
Gerhard Brindoepke
Gerd Walz
Assignee (at issue)
Vianora Resins GmbH
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.