Granted Patent
Utility
US 6,477,820 · App. 09/364,624
Method of making a package with a zipper closure
Inventors:
Herberto Dutra, Mark C. Mikol
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Jul 29, 1999
Inventors
Herberto Dutra
Mark C. Mikol
Assignee (at issue)
KRAFT FOODS HOLDINGS, 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.