Granted Patent
Utility
US 4,700,722 · App. 06/861,897
Process for retaining alkaloids by treating with strong acids before drying
Inventors:
Kevin R. Korte, Elmer F. Litzinger, Dan T. Wu
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: May 12, 1986
Inventors
Kevin R. Korte
Elmer F. Litzinger
Dan T. Wu
Assignee (at issue)
Brown & Williamson Tobacco 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.