Granted Patent
Utility
US 5,149,943 · App. 07/818,307
Heat sealing member for making contoured heat seals
Inventors:
Vytautas Kupcikevicius, Philip F. Cilia, Darrell L. Burkeen
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Jan 8, 1992
Inventors
Vytautas Kupcikevicius
Philip F. Cilia
Darrell L. Burkeen
Assignee (at issue)
Viskase Companies, 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.