Granted Patent
Utility
US 4,898,780 · App. 07/141,633
Production of microcapsules
Inventor:
Michael Seitz
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Jan 7, 1988
Inventor
Michael Seitz
Assignee (at issue)
Standard Register, 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.