GENEVA, May 9 -- GUANGZHOU HEYGEARS IMC. INC (Room 501, 601, Block B2, No. 11, Kaiyuan Avenue, Science City, Hi-Tech, Development Zone,Guangzhou, Guangdong 510663), 广州黑格智造信息科技有限公司 (中国广东省广州市高新技术产业开发区科学城开源大道11号B2栋501室,B2栋601室) filed a patent application (PCT/CN2025/130292) for "GAS PURIFICATION METHOD FOR THREE-DIMENSIONAL PRINTING, GAS PURIFICATION APPARATUS, AND 3D PRINTING SYSTEM" on Oct 27, 2025. With publication no. WO/2026/092397, the detail...