Granted Patent
Utility
US 4,254,037 · App. 06/088,286
2,2-Dialkyltetrahydropyrans
Inventor:
Lawrence H. Shepherd, Jr.
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Oct 26, 1979
Inventor
Lawrence H. Shepherd, Jr.
Assignee (at issue)
Ethyl 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.