Granted Patent
Utility
US 4,842,420 · App. 07/134,270
Variable-width draw tape for thermoplastic bags
Inventors:
Daniel J. DiBiasi, Fox J. Herrington
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Dec 14, 1987
Inventors
Daniel J. DiBiasi
Fox J. Herrington
Assignee (at issue)
Mobil Oil 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.