Granted Patent
Utility
US 4,288,571 · App. 05/336,120
Polyester compositions
Inventors:
Lowell R. Comstock, Percy L. Smith
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Feb 26, 1973
Inventors
Lowell R. Comstock
Percy L. Smith
Assignee (at issue)
Union Carbide Corporation
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.