US 11,874,286 B1
System and method for target substance identification
Michael Scott Lynn, Piedmont, CA (US); Hamilton Roger Tang, Los Altos, CA (US); Kate L. Bechtel, Pleasant Hill, CA (US); Peter A. Holst, Los Altos, CA (US); Jacob A. Wolf, Oakland, CA (US); and Kevin M. Limtao, Milpitas, CA (US)
Assigned to Hound Labs, Inc., Oakland, CA (US)
Filed by Hound Labs, Inc., Oakland, CA (US)
Filed on Mar. 15, 2021, as Appl. No. 17/249,817.
Application 17/249,817 is a continuation of application No. 15/943,123, filed on Apr. 2, 2018, granted, now 10,955,428.
Application 15/943,123 is a continuation of application No. 15/217,264, filed on Jul. 22, 2016, granted, now 9,933,445, issued on Apr. 3, 2018.
Claims priority of provisional application 62/351,821, filed on Jun. 17, 2016.
Claims priority of provisional application 62/351,858, filed on Jun. 17, 2016.
Claims priority of provisional application 62/337,286, filed on May 16, 2016.
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 33/497 (2006.01); G01N 33/94 (2006.01); A61B 5/097 (2006.01); A61B 5/08 (2006.01); A61B 5/00 (2006.01); B01L 3/00 (2006.01); G01N 21/77 (2006.01)
CPC G01N 33/948 (2013.01) [A61B 5/082 (2013.01); A61B 5/097 (2013.01); A61B 5/4845 (2013.01); B01L 3/502738 (2013.01); G01N 2021/7786 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A tetrahydrocannabinol (THC) detection system comprising:
a plurality of components, the plurality of components including;
one or more chambers to elute and retain a breath constituent sample;
one or more indicator chambers containing an indicator;
a buffer reservoir containing a basic buffer;
a THC reservoir containing a non-zero amount of THC;
one or more optical measurement chambers and one or more optical measurement sensors configured to obtain optical measurements from substances in the one or more optical measurement chambers;
a plurality of valves that are configured to fluidly connect the plurality of components; and
a controller configured to control the plurality of components connected by the plurality of valves to:
(i) combine at least a first portion of the basic buffer with the breath constituent sample to form a sample buffer mixture;
(ii) combine at least a first portion of the indicator with sample buffer mixture to cause a first sample composition to be formed with any THC that is present in the breath constituent sample;
(iii) deliver a first sample composition mixture that includes the first sample composition and the basic buffer to the optical measurement chamber;
(iv) combine at least a second portion of indicator with a first amount of THC in the THC reservoir and the basic buffer to form a second sample composition mixture that includes a second sample composition formed by the indicator and the first amount of THC in the THC reservoir; and
(v) deliver the second sample composition to the one or more optical measurement chambers.