Granted Patent
Utility
US 4,927,489 · App. 07/201,228
Method for doping a melt
Inventors:
Robert B. Campbell, Edgar L. Kochka, Paul A. Piotrowski
Patented Case
View Patent ↗
Granted: May 22, 1990
Filed: Jun 2, 1988
Inventors
Robert B. Campbell
Edgar L. Kochka
Paul A. Piotrowski
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.