Granted Patent
Utility
US 5,736,621 · App. 08/670,549
Process for the preparation of polyesters and copolyesters, the products prepared by this process and their use
Inventors:
Peter Simon, Andree Henze, Karsten Blatter
Patented Case
View Patent ↗
Granted: Apr 7, 1998
Filed: Jun 27, 1996
Inventors
Peter Simon
Andree Henze
Karsten Blatter
Assignee (at issue)
Hoechst GmbH
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.