Granted Patent
Utility
US 6,367,930 · App. 09/476,251
Process for preparing a photochromic lens
Inventors:
Pia I. Santelices, James N. Rieck, Jack C. Chan, Sivaram Krishnan, William G. Curtis, Robert A. Pyles
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Dec 30, 1999
Inventors
Pia I. Santelices
James N. Rieck
Jack C. Chan
Sivaram Krishnan
William G. Curtis
Robert A. Pyles
Assignee (at issue)
Bayer Aktiengesellschaft
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.