US Patent Issued to DIC on June 17 for "Block copolymer intermediate, block copolymer, and production methods for same" (Japanese Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,148, issued on June 17, was assigned to DIC Corp. (Tokyo).

"Block copolymer intermediate, block copolymer, and production methods for same" was invented by Youki Kou (Takaishi, Japan) and Hisakazu Tanaka (Takaishi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a block copolymer having a narrow molecular weight distribution such that the copolymer can be used in a DSA technique, a block copolymer intermediate thereof, and methods for producing the same. A block copolymer intermediate represented by the general formula (1) or (2) is used:wherein, in the general formulae (1) and (2), each of R1 and R3 independently represents a poly...