Granted Patent
Utility
US 6,645,971 · App. 09/807,173
Quinazolinone derivatives
Inventors:
Masami Muraoka, Kazuki Matsui, Koji Morishita, Naohito Ohashi
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Apr 10, 2001
Inventors
Masami Muraoka
Kazuki Matsui
Koji Morishita
Naohito Ohashi
Assignee (at issue)
Sumitomo Pharmaceuticals Company Limited
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.