ALEXANDRIA, Va., March 26 -- United States Patent no. 12,256,736, issued on March 25, was assigned to Nippon Soda Co. Ltd. (Tokyo).
"Pyridazine compound and herbicide" was invented by Ken Mihara (Odawara, Japan), Yoji Ikeda (Odawara, Japan), Yukina Taki (Odawara, Japan) and Kazushige Kato (Odawara, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A compound represented by formula (I) or a salt thereof, and a herbicide containing at least one selected from the group consisting of the compounds described above as an active ingredient. In formula (I), R1 represents a substituted or unsubstituted C1 to C6 alkyl group, or the like, R2 represents H, a substituted or unsubstituted C1 to C6 alkyl group, or the l...