Granted Patent
Utility
US 6,764,646 · App. 10/170,945
Ni-Cr-Mo-Cu alloys resistant to sulfuric acid and wet process phosphoric acid
Inventors:
Paul Anthony Crook, Martin L. Caruso
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Jun 13, 2002
Inventors
Paul Anthony Crook
Martin L. Caruso
Assignee (at issue)
Haynes International, Inc.
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.