Granted Patent
Utility
US 4,687,657 · App. 06/872,312
Fabrication of SiC - AlN alloys
Inventors:
Terence J. Clark, Robert E. Johnson
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Jun 9, 1986
Inventors
Terence J. Clark
Robert E. Johnson
Assignee (at issue)
Celanese GmbH
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.