Granted Patent
Utility
US 4,293,513 · App. 05/576,640
Method of making honeycomb structures
Inventors:
Robert Langley, Herbert Myers, Muriel Abrash
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: May 12, 1975
Inventors
Robert Langley
Herbert Myers
Muriel Abrash
Assignee (at issue)
Engelhard Minerals & Chemicals 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.