Granted Patent
Utility
US 4,829,641 · App. 07/064,959
Enhanced color change interlocking closure strip
Inventor:
John W. Williams
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Jun 22, 1987
Inventor
John W. Williams
Assignee (at issue)
First Brands 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.