Granted Patent
Utility
US 5,868,281 · App. 08/785,201
Non-spill bottle cap
Inventors:
Steven H. Bietzer, Brian M. Adams, Daniel Luch
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Jan 17, 1997
Inventors
Steven H. Bietzer
Brian M. Adams
Daniel Luch
Assignee (at issue)
Portola Packaging, Inc.
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.