Granted Patent
Utility
US 5,181,045 · App. 07/764,014
Bleed alleviation using pH-sensitive dyes
Inventors:
James P. Shields, Raymond Adamic
Patented Case
View Patent ↗
Granted: Jan 19, 1993
Filed: Sep 23, 1991
Inventors
James P. Shields
Raymond Adamic
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.