Granted Patent
Utility
US 4,505,939 · App. 06/556,442
Tar-depleted liquid smoke treated food casing
Inventor:
Herman S. Chiu
Patented Case
View Patent ↗
Granted: Mar 19, 1985
Filed: Nov 30, 1983
Inventor
Herman S. Chiu
Assignee (at issue)
Union Carbide 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.