Granted Patent
Utility
US 4,830,786 · App. 06/834,168
Squaraine dyes
Inventors:
John Pease, Thomas L. Tarnowski, Donald E. Berger, Jr., Chiu C. Chang, Chun-Hua Chuang
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Feb 27, 1986
Inventors
John Pease
Thomas L. Tarnowski
Donald E. Berger, Jr.
Chiu C. Chang
Chun-Hua Chuang
Assignee (at issue)
Syntex (U.S.A.) LLC
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.