Granted Patent
Utility
US 4,659,778 · App. 06/854,105
Narrow molecular weight polyester oligomers and method of preparation
Inventor:
Roy C. Williams
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Apr 21, 1986
Inventor
Roy C. Williams
Assignee (at issue)
NL Chemicals, 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.