Granted Patent
Utility
US 4,258,205 · App. 05/965,951
2,2-Dimethylcyclopropanecarbaldehyde dimethyl acetal derivatives
Inventors:
Johannes Van Berkel, Hendrik C. Kelderman
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Dec 4, 1978
Inventors
Johannes Van Berkel
Hendrik C. Kelderman
Assignee (at issue)
SHELL OIL COMPANY
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.