Granted Patent
Utility
US 4,304,593 · App. 06/094,128
Embrittling of glass alloys by hydrogen charging
Inventor:
Arnulf J. Maeland
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Nov 14, 1979
Inventor
Arnulf J. Maeland
Assignee (at issue)
Allied Chemical Corporation
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.