Granted Patent
Utility
US 5,019,459 · App. 07/505,159
High temperture corrosion resistant bimetallic cylinder
Inventors:
Schiao F. Chou, Willie C. Roberson
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Apr 5, 1990
Inventors
Schiao F. Chou
Willie C. Roberson
Assignee (at issue)
Xaloy, LLC
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.