Granted Patent
Utility
US 6,780,923 · App. 10/036,707
Reinforced polyester resins having increased toughness and crack resistance
Inventors:
Probir Kumar Guha, Michael J. Siwajek, Robert C. Yen
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: Nov 8, 2001
Inventors
Probir Kumar Guha
Michael J. Siwajek
Robert C. Yen
Assignee (at issue)
ThyssenKrupp Budd Company
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.