Granted Patent
Utility
US 4,447,624 · App. 06/390,490
Preparation of thiophenes
Inventors:
James J. Krutak, Robert Joseph Maleski
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Jun 21, 1982
Inventors
James J. Krutak
Robert Joseph Maleski
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.