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:
Mar. 31, 2026
Filed:
Jan. 31, 2022
Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US);
The Board of Trustees of the University of Illinois, Urbana, IL (US);
Shailesh N. Joshi, Ann Arbor, MI (US);
Dajie Xie, Champaign, IL (US);
Paul V. Braun, Champaign, IL (US);
Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US);
The Board of Trustees of the University of Illinois, Urbana, IL (US);
Abstract
A passive thermal regulation system includes a substrate and a coating. The coating is positioned to encapsulate at least a portion of the substrate. The coating includes a first hydrogel layer and a second hydrogel layer. The first hydrogel layer has a plurality of carbon materials configured to absorb a solar radiation. The second hydrogel layer includes a hydrogel that is different from the first hydrogel layer. The coating, at a first temperature, causes the passive thermal regulation system to passively switch from a solar reflective state to solar absorber state to permit the plurality of carbon materials to absorb the solar radiation. At a second temperature, the coating causes the system to passively switch from the solar absorber state to the solar reflective state where the hydrogel of the second hydrogel layer inhibits the solar radiation from absorption. The second temperature is greater than the first temperature.