Granted Patent
Utility
US 5,911,843 · App. 09/104,472
Casting, thermal transforming and semi-solid forming aluminum alloys
Inventor:
S. Craig Bergsma
Patented Case
View Patent ↗
Granted: Jun 15, 1999
Filed: Jun 25, 1998
Inventor
S. Craig Bergsma
Assignee (at issue)
Northwest Aluminum Company
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.