Granted Patent
Utility
US 4,978,725 · App. 06/780,325
Toughened polyoxymethylene and shaped articles produced therefrom
Inventors:
Eckart Reske, Ernst Wolters
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Sep 26, 1985
Inventors
Eckart Reske
Ernst Wolters
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.