Granted Patent
Utility
US 4,503,197 · App. 06/592,650
Water soluble polyethylene terephthalate derivatives
Inventors:
George P. Speranza, Robert A. Grigsby, Jr.
Patented Case
View Patent ↗
Granted: Mar 5, 1985
Filed: Mar 23, 1984
Inventors
George P. Speranza
Robert A. Grigsby, Jr.
Assignee (at issue)
Texaco 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.