US 11,940,432 B2
Gas detector
Masato Takeuchi, Sakai (JP); Junpei Furuno, Sakai (JP); Kenta Fukui, Sakai (JP); Kuniyuki Izawa, Minoo (JP); Masakazu Sai, Minoo (JP); Hirokazu Mitsuhashi, Osaka (JP); and Takafumi Taniguchi, Osaka (JP)
Assigned to FIGARO ENGINEERING INC., Osaka (JP); NEW COSMOS ELECTRIC CO., LTD., Osaka (JP); and UNIVERSITY PUBLIC CORPORATION OSAKA, Osaka (JP)
Appl. No. 17/267,059
Filed by Figaro Engineering Inc., Minoo (JP); New Cosmos Electric Co., Ltd., Osaka (JP); and University Public Corporation Osaka, Osaka (JP)
PCT Filed Jul. 25, 2019, PCT No. PCT/JP2019/029238
§ 371(c)(1), (2) Date Feb. 9, 2021,
PCT Pub. No. WO2020/031723, PCT Pub. Date Feb. 13, 2020.
Claims priority of application No. 2018-151404 (JP), filed on Aug. 10, 2018.
Prior Publication US 2021/0164951 A1, Jun. 3, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 33/00 (2006.01); B01D 71/08 (2006.01); B01D 71/22 (2006.01)
CPC G01N 33/0014 (2013.01) [B01D 71/08 (2013.01); B01D 71/22 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A gas detector comprising: a gas detection unit; and a filter introducing surrounding atmosphere to the gas detection unit,
wherein the filter comprises a gas-permeable organic polymer membrane having an acidic group or a basic group and wherein said gas-permeable organic polymer membrane is configured to make gases to be detected permeate said gas-permeable organic polymer membrane and to fix siloxane molecules in said gas-permeable organic polymer membrane.