Granted Patent
Utility
US 4,615,950 · App. 06/712,308
Printed circuit boards having improved adhesion between solder mask and metal
Inventors:
Paul L. K. Hung, Richard J. Radigan, David S. Rosen
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Mar 15, 1985
Inventors
Paul L. K. Hung
Richard J. Radigan
David S. Rosen
Assignee (at issue)
M&T Chemicals, 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.