Granted Patent
Utility
US 4,584,362 · App. 06/706,439
Bismuth catalyst system for preparing polyurethane elastomers
Inventors:
Arthur R. Leckart, H. Victor Hansen
Patented Case
View Patent ↗
Granted: Apr 22, 1986
Filed: Feb 27, 1985
Inventors
Arthur R. Leckart
H. Victor Hansen
Assignee (at issue)
Cosan Chemical Corporation
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.