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:
Jan. 09, 2024
Filed:
Mar. 04, 2020
University of Maryland, College Park, College Park, MD (US);
Government of the United States of America, As Represented BY the Secretary of Commerce, National Institute of Standards and Technology, Gaithersburg, MD (US);
Randolph Elmquist, Gaithersburg, MD (US);
Albert Rigosi, Rockville, MD (US);
Mattias Kruskopf, Washington Grove, MD (US);
Government of the United States of America, Gaithersburg, MD (US);
University of Maryland, College Park, College Park, MD (US);
Abstract
A quantum Hall resistance apparatus is to improve resistance standards and includes a substrate, a graphene epitaxially grown on the substrate and having a plurality of first contact patterns at edges of the graphene, a plurality of contacts, each including a second contact pattern and configured to connect to a corresponding first contact pattern, and a protective layer configured to protect the graphene and to increase adherence between the first contact patterns and the second contact patterns. The contacts become a superconductor at a temperature lower than or equal to a predetermined temperature and under up to a predetermined magnetic flux density.