Granted Patent
Utility
US 4,847,182 · App. 07/092,828
Method for developing a photopolymer printing plate using a developer comprising terpene hydrocarbons
Inventors:
John R. Worns, Trevor Williams
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Sep 3, 1987
Inventors
John R. Worns
Trevor Williams
Assignee (at issue)
W. R. Grace & Co.
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.