Granted Patent
Utility
US 6,186,689 · App. 09/133,673
Cosmetic container having a clean corkage insert
Inventors:
Robert J. Sheffler, Charles Chang
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Aug 13, 1998
Inventors
Robert J. Sheffler
Charles Chang
Assignee (at issue)
Charles Chang
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.