Granted Patent
Utility
US 5,140,069 · App. 07/481,424
Tough epoxy casting resins based on polybutadiene-polyoxyalkleneglycol copolymers
Inventors:
Rolf Mulhaupt, Werner Rufenacht
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Feb 16, 1990
Inventors
Rolf Mulhaupt
Werner Rufenacht
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.