Granted Patent
Utility
US 6,465,148 · App. 09/486,843
Composition for light absorption film formation containing blocked isocyanate compound and antireflection film formed therefrom
Inventors:
Wen-Bing Kang, Ken Kimura, Shoko Matsuo, Yoshinori Nishiwaki, Hatsuyuki Tanaka
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: May 23, 2000
Inventors
Wen-Bing Kang
Ken Kimura
Shoko Matsuo
Yoshinori Nishiwaki
Hatsuyuki Tanaka
Assignee (at issue)
Clariant Finance (BVI) 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.