Granted Patent
Utility
US 5,576,276 · App. 08/415,817
Method of cleaning ophthalmic lenses with alkaline composition
Inventors:
Fu-Pao Tsao, Rosalind Dandridge
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Apr 3, 1995
Inventors
Fu-Pao Tsao
Rosalind Dandridge
Assignee (at issue)
Ciba-Geigy
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.