Granted Patent
Utility
US 4,863,418 · App. 07/310,223
Non-metallic chain including wound composite chain links and molded pins
Inventors:
John A. Fillar, Thomas J. Casper, James Wiegand
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Feb 13, 1989
Inventors
John A. Fillar
Thomas J. Casper
James Wiegand
Assignee (at issue)
Envirex, 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.