The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2025
Filed:
Jun. 08, 2021
United States of America As Represented BY the Administrator of Nasa, Washington, DC (US);
John C. Graf, Houston, TX (US);
United States of America as represented by the Administrator of NASA, Washington, DC (US);
Abstract
Concentration of oxygen gas with electrochemical stacks arranged in series gas flow. A system includes a plurality of electrochemical stacks for extracting oxygen from an input gas, wherein the plurality of electrochemical stacks outputs oxygen gas and oxygen-reduced gas. The system includes a heat exchanger in fluid communication with the plurality of electrochemical stacks, wherein the heat exchanger consumes the input gas and the oxygen-reduced gas, and wherein the heat exchanger transfers heat from the oxygen-reduced gas to the input gas. The system includes a mechanical blower for driving the input gas into the heat exchanger. The system is such that the plurality of electrochemical stacks are organized in series gas flow.