ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,675, issued on Jan. 13, was assigned to ZEON Corp. (Tokyo).
"Method for producing hollow particles and hollow particles" was invented by Sakyo Yagyu (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing hollow particles which comprise a shell and a hollow portion surrounded by the shell and which have a void ratio of 50% or more, the method comprising: preparing a mixture liquid containing a polymerizable monomer, a hydrophobic solvent, a polymerization initiator, a dispersion stabilizer and an aqueous medium, suspending the mixture liquid to prepare a suspension in which droplets or a monomer composition containing the polyme...