Granted Patent
Utility
US 4,834,993 · App. 06/695,821
Method for external liquid smoke treatment of cellulosic food casings
Inventor:
Herman S. Chiu
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Jan 28, 1985
Inventor
Herman S. Chiu
Assignee (at issue)
Viskase Companies, Inc.
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.