Granted Patent
Utility
US 5,153,287 · App. 07/596,822
Preparation of hydroxylated low molecular weight polymodal butadiene polymers
Inventors:
Ernest L. Yeakey, Wei-Yang Su
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Oct 12, 1990
Inventors
Ernest L. Yeakey
Wei-Yang Su
Assignee (at issue)
Texaco Chemical Inc.
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.