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:
Apr. 28, 2009
Filed:
Sep. 04, 2007
Harlan J. Byker, West Olive, MI (US);
Frederick A. Millett, Grand Haven, MI (US);
Paul H. Ogburn, Jr., Hudsonville, MI (US);
Douglas A. Vander Griend, Grand Rapids, MI (US);
Brad S. Veldkamp, Zeeland, MI (US);
Derick D. Winkle, Holland, MI (US);
Harlan J. Byker, West Olive, MI (US);
Frederick A. Millett, Grand Haven, MI (US);
Paul H. Ogburn, Jr., Hudsonville, MI (US);
Douglas A. Vander Griend, Grand Rapids, MI (US);
Brad S. Veldkamp, Zeeland, MI (US);
Derick D. Winkle, Holland, MI (US);
Pleotint, L.L.C., West Olive, MI (US);
Abstract
Ligand exchange of thermochromic, LETC, systems exhibiting a reversible change in absorbance of electromagnetic radiation as the temperature of the system is reversibly changed are described. The described LETC systems include one or more than one transition metal ion, which experiences thermally induced changes in the nature of the complexation or coordination around the transition metal ion(s) and, thereby, the system changes its ability to absorb electromagnetic radiation as the temperature changes. In accordance with one aspect of the present invention, a thermochromic device is disclosed comprising at least two thermochromic layers when each thermochromic layer includes a polymer, at least one transition metal ion, at least one HεL ligand capable of forming a HεMLC with the transition metal ion and at least one LεL ligand capable of forming an LεMLC with the transition metal ion. In accordance with yet another aspect of the present invention, the thermochromic device further includes a separator between the first and second thermochromic layers to prevent intermixing of the contents of the layers.