Granted Patent
Utility
US 6,004,409 · App. 09/012,010
Production of high quality machinable tolling plate using brazing sheet scrap
Inventors:
Ralph C. Dorward, Greg F. Fitzpatrick
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Jan 22, 1998
Inventors
Ralph C. Dorward
Greg F. Fitzpatrick
Assignee (at issue)
Kaiser Aluminum & Chemical 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.