Granted Patent
Utility
US 5,204,184 · App. 07/579,950
Microencapsulation using tertiary aliphatic isocyanate capsule wall material
Inventors:
Richard L. Shields, Michael Seitz
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Sep 10, 1990
Inventors
Richard L. Shields
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.