Granted Patent
Utility
US 6,562,880 · App. 10/124,567
Polyurethane or polyisocyanurate foams blown with hydrofluorocarbons and carbon atoms
Inventors:
Herman P. Doerge, Mauricio H. Venegas
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Apr 17, 2002
Inventors
Herman P. Doerge
Mauricio H. Venegas
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.