Granted Patent
Utility
US 4,459,384 · App. 06/485,823
Process for preparing polyesters or poly(ester carbonates) in the presence of a processing aid
Inventors:
Markus Matzner, Louis M. Maresca
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Apr 18, 1983
Inventors
Markus Matzner
Louis M. Maresca
Assignee (at issue)
Union Carbide 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.