Granted Patent
Utility
US 4,771,079 · App. 07/122,693
Graphic art printing media using a syntactic foam based on expanded hollow polymeric microspheres
Inventor:
George E. Melber
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Nov 19, 1987
Inventor
George E. Melber
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.