Granted Patent
Utility
US 4,742,149 · App. 06/732,863
Production of melt consistent aromatic polyesters
Inventor:
Arnold B. Finestone
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: May 10, 1985
Inventor
Arnold B. Finestone
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.