Granted Patent
Utility
US 6,440,568 · App. 09/230,224
Plastic lenses and primer composition used for coating the same
Inventors:
Hisayuki Kayanoki, Fujio Sawaragi
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Jan 22, 1999
Inventors
Hisayuki Kayanoki
Fujio Sawaragi
Assignee (at issue)
Nippon Arc Co., Ltd.
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.