Granted Patent
Utility
US 4,217,368 · App. 05/953,291
Long-lasting chewing gum and method
Inventors:
Frank Witzel, Donald A. M. Mackay, Abraham I. Bakal, K. Warren Clark
Patented Case
View Patent ↗
Granted: Aug 12, 1980
Filed: Oct 20, 1978
Inventors
Frank Witzel
Donald A. M. Mackay
Abraham I. Bakal
K. Warren Clark
Assignee (at issue)
Lifesavers LLC
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.