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:
Oct. 06, 2020
Filed:
Apr. 23, 2018
E Ink Corporation, Billerica, MA (US);
Stephen J. Telfer, Arlington, MA (US);
Richard J. Paolini, Jr., Framingham, MA (US);
Stephen Bull, Windham, NH (US);
Joshua A. Ritchey, Melrose, MA (US);
Kosta Ladavac, Somerville, MA (US);
Lee Yezek, Watertown, MA (US);
Craig A. Herb, Medford, MA (US);
Peter Carsten Bailey Widger, Nashua, NH (US);
E Ink Corporation, Billerica, MA (US);
Abstract
A variable transmission medium comprises a fluid and a plurality of nanoparticles dispersed in the fluid, wherein addition of acid to the fluid causes the nanoparticles to flocculate and form aggregates of particles that scatter light. The nanoparticles may comprise at least one metal oxide, such as titanium dioxide, zinc oxide or zirconium dioxide. The fluid may have a dielectric constant less than about 10. The medium may be used in, for example, privacy glass for a conference room.