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:
Jul. 01, 2025
Filed:
Jul. 19, 2023
E Ink Corporation, Billerica, MA (US);
Peter Carsten Bailey Widger, Nashua, NH (US);
Jay William Anseth, Canton, MA (US);
Richard J. Paolini, Jr., Framingham, MA (US);
Mark Benjamin Romanowsky, Cambridge, MA (US);
Jillian Smith, Dorchester, MA (US);
Stephen J. Telfer, Arlington, MA (US);
Craig Alan Breen, Arlington, MA (US);
Stephen Bull, Windham, NH (US);
E Ink Corporation, Billerica, MA (US);
Abstract
A variable transmission film may include an electrophoretic medium having a plurality of capsules and a binder, each capsule containing a plurality of electrically charged particles and a fluid, the charged particles being movable by application of an electric field and being capable of being switched between an open state and a closed state. The film may include at least one of a binder containing fish gelatin and a polyanion; a binder containing one or more tinting agents; capsules containing charge control agents, such as an oligoamine-terminated polyolefin and a branched chain fatty acid comprising at least 8 carbon atoms; a selection of capsules in which at least 60% have a diameter between 50 μm and 90 μm and at least 15% have a diameter between 20 μm and 49 μm; a tinted adhesive layer; and a fluid selected from one or more nonconjugated olefinic hydrocarbons.