ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,679, issued on Jan. 13, was assigned to Kubota Corp. (Osaka, Japan).
"Flat membrane element and method for producing same" was invented by Kimihiro Ishikawa (Amagasaki, Japan), Makoto Takahashi (Amagasaki, Japan) and Kenichi Tagawa (Amagasaki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The outer edge of a filtration membrane is thermally welded to a filter plate by a first thermal welding part. The first thermal welding part includes an outer boundary line disposed inside an outer edge of the filter plate and an inner boundary line disposed inside the outer boundary line. The outer boundary line has a plurality of first projected portions ...