Granted Patent
Utility
US 5,614,605 · App. 08/359,213
Rigid polyurethanes based on allophanate-modified aliphatic and/or cycloaliphatic polyisocyanurates
Inventors:
Robson Mafoti, William E. Slack
Patented Case
View Patent ↗
Granted: Mar 25, 1997
Filed: Dec 19, 1994
Inventors
Robson Mafoti
William E. Slack
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.