Granted Patent
Utility
US 6,253,939 · App. 09/224,962
Tamper-evident closure having improved drainage
Inventors:
Min Wan, Manuel Mueller, Valentin Hierzer, Donald Deubel
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Jan 4, 1999
Inventors
Min Wan
Manuel Mueller
Valentin Hierzer
Donald Deubel
Assignee (at issue)
Crown Cork & Seal Technologies 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.