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:
Jul. 21, 2026
Filed:
Sep. 29, 2025
Zhili Feng, Knoxville, TN (US);
Zhili Feng, Knoxville, TN (US);
Abstract
A method and apparatus for compressing gaseous hydrogen or other gases utilize a liquid compressor to achieve high pressure while controlling vapor content. Gaseous hydrogen from a source at an inlet pressure is compressed in a liquid compression chamber using a liquid, preferably water or a water-based liquid, to a predetermined pressure at which vapor in the compressed gas is below the required concentration level for applications. The compressed gas flows into a high-pressure gas chamber, where it is isolated from the compression liquid once the predetermined pressure is reached, ensuring the vapor content remains below a specified threshold. The compressed gas is then transferred to a storage tank at a lower storage pressure. Embodiments include cooling the high-pressure chamber, adding freezing-point-lowering additives to the liquid. The invention enhances compression efficiency, reduces costs, and meets stringent purity requirements for applications such as fuel cells.