Granted Patent
Utility
US 5,258,556 · App. 08/011,584
Process for the manufacture of 2,2,4,4-tetramethylcyclobutanediol
Inventors:
Charles Sumner, Bruce L. Gustafson, Jennifer R. Knight
Patented Case
View Patent ↗
Granted: Nov 2, 1993
Filed: Feb 1, 1993
Inventors
Charles Sumner
Bruce L. Gustafson
Jennifer R. Knight
Assignee (at issue)
EASTMAN KODAK COMPANY
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.