Granted Patent
Utility
US 6,503,440 · App. 09/828,109
Process for making a container with a pressure equalization opening and containers produced accordingly
Inventors:
Torsten Kuehn, Burkhard Metzger
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: Apr 6, 2001
Inventors
Torsten Kuehn
Burkhard Metzger
Assignee (at issue)
BOEHRINGER INGELHEIM PHARMA GMBH & CO. KG
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.