US Patent Issued to FMC on Oct. 7 for "Pyridazinone herbicides and pyridazinone intermediates used to prepare a herbicide" (Delaware, Maryland Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,044, issued on Oct. 7, was assigned to FMC Corp. (Philadelphia).

"Pyridazinone herbicides and pyridazinone intermediates used to prepare a herbicide" was invented by Thomas Paul Selby (Hockessin, Del.), Thomas Martin Stevenson (Newark, Del.), Stephen Frederick McCann (Newark, Del.), Eric Allen Marshall (Rising Sun, Md.) and Yuzhong Chen (Wilmington, Del.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are compounds of Formula I and N-oxides or salts thereof, wherein R1 is C1-C4alkyl or C3-C6cycloalkyl; R2 is H, Cl, Br or I; R3 is Cl or OR4; R4 is H or C1-C4 alkyl; R5 is H, F, Cl or CH3; and R6 is H or Cl. Also disclosed is a composition cont...