Granted Patent
Utility
US 4,300,685 · App. 06/124,177
Multiple particle package and method
Inventor:
Walter Stern
Patented Case
View Patent ↗
Granted: Nov 17, 1981
Filed: Feb 25, 1980
Inventor
Walter Stern
Assignee (at issue)
Johns Manville
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.