Granted Patent
Utility
US 5,070,041 · App. 07/391,986
Method of removing flash from a semiconductor leadframe using coated leadframe and solvent
Inventors:
Shigeru Katayama, Kaoru Tominaga, Toshio Suetsugu, Kazumi Matsumoto
Patented Case
View Patent ↗
Granted: Dec 3, 1991
Filed: Aug 10, 1989
Inventors
Shigeru Katayama
Kaoru Tominaga
Toshio Suetsugu
Kazumi Matsumoto
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.