Granted Patent
Utility
US 4,201,834 · App. 05/966,694
Powder composition and method of preparation
Inventors:
Martin J. Hannon, Richard K. Greene
Patented Case
View Patent ↗
Granted: May 6, 1980
Filed: Dec 5, 1978
Inventors
Martin J. Hannon
Richard K. Greene
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.