IP Library › Granted Patent US 4,456,771
Granted Patent Utility
US 4,456,771 · App. 06/415,020

Chemical process for preparing 1,3-diketones

Inventors: Charles R. Everly, Jerry M. Roper
Patented Case View Patent ↗
Granted: Jun 26, 1984 Filed: Sep 7, 1982
Inventors
Charles R. Everly
Jerry M. Roper
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,456,771
App. No.
06/415,020
Filed
1982-09-07
Granted
1984-06-26
Kind
A