Granted Patent
Utility
US 5,378,497 · App. 08/016,077
Method for providing irreversible smoothness in a paper rawstock
Inventors:
Dean Johnson, Hans W. Maurer
Patented Case
View Patent ↗
Granted: Jan 3, 1995
Filed: Feb 10, 1993
Inventors
Dean Johnson
Hans W. Maurer
Assignee (at issue)
Westvaco 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.