Granted Patent
Utility
US 4,759,486 · App. 06/735,545
Controlled environment chamber for use in cladding a nonaluminum core with aluminum
Inventors:
William M. Malone, Malcolm J. Fraser
Patented Case
View Patent ↗
Granted: Jul 26, 1988
Filed: May 20, 1985
Inventors
William M. Malone
Malcolm J. Fraser
Assignee (at issue)
Copperweld 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.