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:
Aug. 04, 2026
Filed:
Oct. 16, 2020
Posco, Pohang-si, KR;
Jong-Hee Kim, Daejeon, KR;
Bo-Sung Seo, Pohang-si, KR;
Kwangmin Kim, Pohang-si, KR;
Youngjun Kim, Pohang-si, KR;
POSCO, Pohang-si, KR;
Abstract
A stainless steel a fuel cell separator including a surface oxide layer having a bandgap energy of 2 eV or less. A value of the surface oxide atomic ratio ((sum of atomic concentrations of metal elements in metal oxide (MO)/(sum of atomic concentrations of metal elements in total oxides and hydroxides))) is 0.44 or less, as measured on the surface of a stainless steel containing 15 wt % or more of Cr by X-ray angle-resolved photoemission spectroscopy using an Al-Kα X-ray source under the condition where a take-off angle of photoelectrons is from 12° to 85°. The metal oxide (MO) includes a mixed oxide: M represents an alloying element other than Cr and Fe or a combination thereof in the matrix; and O represents oxygen; and the total oxides and hydroxides include a Cr oxide, a Cr hydroxide, an Fe oxide, an Fe hydroxide, and the metal oxide (MO).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile