Granted Patent
Utility
US 5,202,390 · App. 07/766,883
Butadiene/polar comonomer copolymer and aromatic reactive end group-containing prepolymer
Inventors:
Rolf Mulhaupt, Werner Rufenacht
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Sep 26, 1991
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.