Granted Patent
Utility
US 4,443,411 · App. 06/294,737
Apparatus for controlling the atmosphere surrounding a crystal growth zone
Inventor:
Juris P. Kalejs
Patented Case
View Patent ↗
Granted: Apr 17, 1984
Filed: Aug 20, 1981
Inventor
Juris P. Kalejs
Assignee (at issue)
Mobil Solar Energy 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.