Granted Patent
Utility
US 5,869,220 · App. 08/870,899
Waterborne photoresist emulsions and methods of preparation thereof
Inventors:
John Scott Hallock, Hiroshi Samukawa
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Jun 6, 1997
Inventors
John Scott Hallock
Hiroshi Samukawa
Assignee (at issue)
MacDermid Acumen, 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.