Granted Patent
Utility
US 4,747,774 · App. 07/012,779
Conforming crucible/susceptor system for silicon crystal growth
Inventors:
Paul A. Piotrowski, Edgar L. Kochka, Charles S. Duncan
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Feb 9, 1987
Inventors
Paul A. Piotrowski
Edgar L. Kochka
Charles S. Duncan
Assignee (at issue)
Westinghouse Electric Company LLC
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.