Granted Patent
Utility
US 4,576,737 · App. 06/620,813
Encapsulation of volatile liquids
Inventor:
Richard Johnson
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Jun 15, 1984
Inventor
Richard Johnson
Assignee (at issue)
Internationale Otrool Maatschappij Octropa B.V.
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.