Granted Patent
Utility
US 6,764,574 · App. 09/938,150
Polishing pad composition and method of use
Inventors:
Yaw S. Obeng, Edward M. Yokley, Kathleen C. Richardson
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Aug 22, 2001
Inventors
Yaw S. Obeng
Edward M. Yokley
Kathleen C. Richardson
Assignee (at issue)
PsiloQuest
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.