Granted Patent
Utility
US 5,422,233 · App. 08/243,974
Photographic processing compositions including hydrophobically modified thickening agent
Inventors:
Robert D. Eckert, Daniel D. Huang, Francis M. Pierce
Patented Case
View Patent ↗
Granted: Jun 6, 1995
Filed: May 17, 1994
Inventors
Robert D. Eckert
Daniel D. Huang
Francis M. Pierce
Assignee (at issue)
Polaroid Corporation
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.