Granted Patent
Utility
US 4,670,528 · App. 06/879,394
Polymeric pyridinium ylides and products prepared from same
Inventors:
Lloyd D. Taylor, Michael Haubs
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Jun 27, 1986
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.