IP Library › Granted Patent US 12,480,867
Granted Patent B2
US 12,480,867 · App. 18/033,948 · Granted Nov 25, 2025

Methods and apparatus for measuring methane emissions with an optical open-cavity methane sensor

Inventors: Garrett Niall John (Escondido, CA); James Rutherford (Cypress, TX); Brendan James Smith (Lakeway, TX)
Assignee: SeekOps Inc.
G01N21/31G01N1/2202G01N2201/06113G01N2201/0636
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Quick Facts
Patent No.
US 12,480,867
App. No.
18/033,948
Granted
Nov 25, 2025
Kind
B2
Abstract

Systems, devices, and methods including: an air inlet configured to receive air; an air outlet configured to expel air; a duct connected between the air inlet and the air outlet; and an open-cavity optical sensor disposed in the duct, where an air flow stream within the duct passes through the open-cavity optical sensor.

Claims (38)

1 . A system comprising:

an air inlet configured to receive air;

an air outlet configured to expel air;

a duct connected between the air inlet and the air outlet;

an open-cavity sensor disposed in the duct, wherein an air flow stream within the duct passes through the open-cavity sensor, and wherein the open-cavity sensor is configured to detect at least one trace gas in the air flow stream;

a low pressure trap disposed in the duct prior to the air flow stream passing through the open-cavity sensor; and

a processor configured to determine trace gas emission measurements based on trace gas detection by the open-cavity sensor.

2 . The system of claim 1 , wherein the processor is further configured to determine trace gas concentrations based on the trace gas detection by the open-cavity sensor.

3 . The system of claim 1 , wherein the open-cavity sensor is an open-cavity optical sensor.

4 . The system of claim 1 , wherein the processor is further configured to monitor real-time trace gas emissions based on the trace gas detection by the open-cavity sensor.

5 . The system of claim 1 , wherein the low pressure trap is configured to remove dust from the air flow stream prior to reaching the open-cavity sensor.

6 . The system of claim 1 , wherein the low pressure trap is configured to remove condensed moisture from the air flow stream prior to reaching the open-cavity sensor.

7 . The system of claim 1 , wherein the duct comprises a first cross sectional area, wherein the low pressure trap comprises a second cross sectional area, and wherein the second cross sectional area is larger than the first cross sectional area.

8 . The system of claim 1 , wherein the open-cavity sensor is in communication with a processor to monitor real-time trace gas emissions.

9 . The system of claim 1 , wherein the open-cavity sensor is an open-cavity laser spectroscopy sensor.

10 . The system of claim 1 , further comprising:

a membrane disposed before the open-cavity sensor in the air flow stream.

11 . The system of claim 10 , wherein the membrane is configured to remove dust from the air flow stream prior to reaching the open-cavity sensor.

12 . The system of claim 10 , wherein the membrane is configured to remove condensed moisture from the air flow stream prior to reaching the open-cavity sensor.

13 . The system of claim 1 , further comprising:

a fan disposed after the open-cavity sensor in the air flow stream, wherein the fan is configured to expel the air flow stream via the air outlet.

14 . A method, comprising:

receiving air into a duct from an air inlet in an air flow stream;

receiving air into a low pressure trap disposed in the duct prior to the air flow stream passing through an open-cavity sensor disposed in the duct;

passing the air flow stream through the open-cavity sensor disposed in the duct;

expelling the air flow stream out of the duct through an air outlet after passing through the open-cavity sensor;

detecting, by the open-cavity sensor, at least one trace gas in the air flow stream; and

determining, by a processor, trace gas emission measurements based on trace gas detection by the open-cavity sensor.

15 . The method of claim 14 , further comprising:

determining, by the processor, trace gas concentrations based on the trace gas detection by the open-cavity sensor.

16 . The method of claim 14 , wherein the open-cavity sensor is an open-cavity optical sensor.

17 . The method of claim 14 , further comprising:

monitoring, by the processor, real-time trace gas emissions based on the trace gas detection by the open-cavity sensor.

18 . The method of claim 14 , further comprising:

removing dust from the air flow stream via the low pressure trap prior to reaching the open-cavity sensor.

19 . The method of claim 14 , further comprising:

removing condensed moisture from the air flow stream via the low pressure trap prior to reaching the open-cavity sensor.

20 . The method of claim 14 , wherein the open-cavity sensor is an open-cavity laser spectroscopy sensor.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 31, 2025
From: SMITH, BRENDAN JAMES; JOHN, GARRETT NIALL; RUTHERFORD, JAMES
To: SEEKOPS INC.
Reel/Frame 072746/0216 →
Continuity (2)
Provisional Application 63106195 · Oct 27, 2020
Related Publication 20230393057A1 · Dec 7, 2023
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