	US 12,345,680 B1
	Modular chemiresistive sensor for real-time ethylene monitoring
Anamika Ray, Torrance, CA (US); Yifan Tang, Torrance, CA (US); Tobin Gomez, Lakewood, CA (US); Jeffrey Paul, Torrance, CA (US); Mohammad Mushfiq, Los Angeles, CA (US); Maksudul Alam, Glendora, CA (US); and Uma Sampathkumaran, Torrance, CA (US)
Assigned to InnoSense Corporation, Torrance, CA (US)
Filed by INNOSENSE CORPORATION, Torrance, CA (US)
Filed on Sep. 10, 2021, as Appl. No. 17/447,416.
Application 17/447,416 is a continuation in part of application No. 15/989,125, filed on May 24, 2018, abandoned.
Application 17/447,416 is a continuation in part of application No. 15/851,587, filed on Dec. 21, 2017, abandoned.
Application 15/989,125 is a continuation in part of application No. 14/658,034, filed on Mar. 13, 2015, granted, now 9,896,772.
Claims priority of provisional application 63/078,298, filed on Sep. 14, 2020.
Claims priority of provisional application 63/077,322, filed on Sep. 11, 2020.
Claims priority of provisional application 62/536,940, filed on Jul. 25, 2017.
Claims priority of provisional application 61/952,557, filed on Mar. 13, 2014.
Int. Cl. G01N 33/00 (2006.01); G01N 27/416 (2006.01); G01N 27/417 (2006.01)

CPC G01N 27/4162 (2013.01) [G01N 27/417 (2013.01); G01N 33/0036 (2013.01)]

6 Claims

1. A system for receiving a gas steam from a gaseous environment for sensing the presence and concentration of ethylene in said gaseous environment, said system comprising:

a. a chemical analysis section comprising an ethylene sensor, an ethylene scrubber, a CO₂scrubber, gas flow control valves and a pump to feed quantities of the ethylene containing gaseous environment through the system, the chemical analysis section configured to alternatively deliver quantities of the gas stream in a measurement cycle or a recovery cycle,

b. an electronics section comprising a power supply, a system control board and a measurement board, the measurement board receiving electrical signals from the ethylene sensor,

c. the ethylene sensor comprising

i. a substrate with two electrodes thereon, the electrodes separated by a gap of 0.5 to 4.0 μm, and

ii. a nano-network of conductive polymer nanowires bridging the gap so as to provide an electrically conductive path between the electrodes, said nano-network exhibiting defined electrical characteristics,

iii. the nanowires functionalized by application thereto of chemical compounds sensitive to the presence of ethylene, the electrical characteristics of the functionalized nanofibers changing in response to a defined quantities of ethylene in the gas stream fed to the ethylene sensor.