Granted Patent
Utility
US 5,342,689 · App. 07/965,030
Thermoplastic microspheres
Inventors:
George E. Melber, Leon E. Wolinski, William A. Oswald
Patented Case
View Patent ↗
Granted: Aug 30, 1994
Filed: Oct 23, 1992
Inventors
George E. Melber
Leon E. Wolinski
William A. Oswald
Assignee (at issue)
Pierce & Stevens 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.