Granted Patent
Utility
US 4,305,754 · App. 06/140,435
Chromium recovery from scrap alloys
Inventors:
Alkis S. Rappas, Jameel Menashi, Donald A. Douglas
Patented Case
View Patent ↗
Granted: Dec 15, 1981
Filed: Apr 15, 1980
Inventors
Alkis S. Rappas
Jameel Menashi
Donald A. Douglas
Assignee (at issue)
Cabot 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.