Granted Patent
Utility
US 5,164,126 · App. 07/665,206
Process for microencapsulation
Inventors:
Robert John Kalishek, Donald E. Hayford
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Mar 5, 1991
Inventors
Robert John Kalishek
Donald E. Hayford
Assignee (at issue)
Appleton Papers 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.