Granted Patent
Utility
US 4,448,913 · App. 06/437,651
Fast crystallizing polyethylene terephthalate compositions
Inventors:
Ernest A. Coleman, Kevin Jeremiah Cronin, Frank K. Chu, Robin W. Kirwan
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Oct 29, 1982
Inventors
Ernest A. Coleman
Kevin Jeremiah Cronin
Frank K. Chu
Robin W. Kirwan
Assignee (at issue)
Dart Industries 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.