Granted Patent
Utility
US 4,458,047 · App. 06/385,957
Process for making naphthalene hydrodimer mixtures, product mixtures made thereby and their use as a plasticizer
Inventor:
William D. Vanderwerff
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Jun 7, 1982
Inventor
William D. Vanderwerff
Assignee (at issue)
SUN-TECH LIMITED
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.