Granted Patent
Utility
US 4,271,425 · App. 06/090,797
Encapsulated electronic devices and encapsulating compositions having crown ethers
Inventor:
Ching-Ping Wong
Patented Case
View Patent ↗
Granted: Jun 2, 1981
Filed: Nov 2, 1979
Inventor
Ching-Ping Wong
Assignee (at issue)
Western Electric Company, 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.