Patents Assigned to BIOTERRA. INC.
  • Patent number: 11376539
    Abstract: The present invention relates to a multilayer film for air purification and a method for manufacturing the same and, more particularly, to a multilayer film for air purification having a thin and uniform shape, thereby exhibiting a high degree of utility as a mask and an air purification filter, as well as having an excellent air purification function, and a method for manufacturing the same. The objective of the present invention is to provide a multilayer film for air purification and a method for manufacturing the multilayer film for air purification, which comprises yellow ocher-activated carbon composite particles capable of removing fine dust, bacteria, odor, VOC, etc. present in the air.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: July 5, 2022
    Assignee: BIOTERRA. INC.
    Inventor: Kyung Sook Lee