Granted Patent
Utility
US 6,316,513 · App. 09/194,979
Process for the producing of hard polyurethane foams with low heat conductivity
Inventors:
Dennis McCullough, Torsten Heinemann, Norbert Eisen, Walter Klan
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Mar 8, 1999
Inventors
Dennis McCullough
Torsten Heinemann
Norbert Eisen
Walter Klan
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.