Granted Patent
Utility
US 4,617,253 · App. 06/617,726
Polymeric pyridinium ylides and products prepared from same
Inventors:
Lloyd D. Taylor, Michael Haubs
Patented Case
View Patent ↗
Granted: Oct 14, 1986
Filed: Jun 6, 1984
Inventors
Lloyd D. Taylor
Michael Haubs
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.