Granted Patent
Utility
US 6,450,359 · App. 09/695,450
Sanitary beverage can lid
Inventors:
Charles Chang, Lucy Chang
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Oct 24, 2000
Inventors
Charles Chang
Lucy 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.