Granted Patent
Utility
US 5,744,503 · App. 08/595,690
Recycling polyester and recovering glycols
Inventors:
Brad Smith, Gary E. Wilkins
Patented Case
View Patent ↗
Granted: Apr 28, 1998
Filed: Feb 1, 1996
Inventors
Brad Smith
Gary E. Wilkins
Assignee (at issue)
Hoechst Celanese 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.