Granted Patent
Utility
US 5,013,355 · App. 07/323,708
Method and apparatus for producing matte and/or metal
Inventors:
Hans I. Elvander, Rolf E. Malmstrom
Patented Case
View Patent ↗
Granted: May 7, 1991
Filed: Mar 15, 1989
Inventors
Hans I. Elvander
Rolf E. Malmstrom
Assignee (at issue)
A. Ahlstrom 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.