Granted Patent
Utility
US 5,070,153 · App. 07/340,118
Molded polybenzimidazole/polyaryleneketone articles and method of manufacture
Inventors:
Edwardo Alvarez, Lorenzo P. DiSano, Bennett C. Ward
Patented Case
View Patent ↗
Granted: Dec 3, 1991
Filed: Apr 13, 1989
Inventors
Edwardo Alvarez
Lorenzo P. DiSano
Bennett C. Ward
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.