US Patent Issued to FMC on Feb. 17 for "Atropisomers of pyridazinone derivatives as herbicides" (Delaware Inventors)

ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,552,752, issued on Feb. 17, was assigned to FMC Corp. (Philadelphia).

"Atropisomers of pyridazinone derivatives as herbicides" was invented by Thomas Paul Selby (Hockessin, Del.), John Robbins Debergh (Middletown, Del.), Thomas Martin Stevenson (Newark, Del.) and Stephen Frederick Mccann (Newark, Del.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides atropisomers of pyridazinone derivatives of a compound of Formula 1a and Formula 1b, N-oxides or salts thereof, wherein R1, R2, R3, R4 and R5 are defined in the disclosure. Also disclosed is a composition containing a compound of Formula 1a or 1b, and methods for controlling und...