Granted Patent
Utility
US 5,855,821 · App. 08/577,256
Materials for semiconductor device assemblies
Inventors:
Michael M. Chau, Donald Arthur Burkhart
Patented Case
View Patent ↗
Granted: Jan 5, 1999
Filed: Dec 22, 1995
Inventors
Michael M. Chau
Donald Arthur Burkhart
Assignee (at issue)
Johnson Matthey Inc.
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.