Granted Patent
Utility
US 6,709,739 · App. 09/980,493
Closed cell metal composites
Inventors:
Robert L. Mullen, Mehmet Ozgur, Gerhard E. Welsch
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Jun 24, 2002
Inventors
Robert L. Mullen
Mehmet Ozgur
Gerhard E. Welsch
Assignee (at issue)
Case Western Reserve University
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.