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:
Aug. 12, 2008
Filed:
Feb. 09, 2007
Charles Howie Honeyman, Roslindale, MA (US);
Elizabeth Moran Gates, Somerville, MA (US);
Libing Zhang, Sharon, MA (US);
Anthony Edward Pullen, Belmont, MA (US);
Emily J. Pratt, Portsmouth, NH (US);
Kimberly L. Houde, Bethesda, MD (US);
Matthew A. King, Marina del Rey, CA (US);
Craig A. Herb, Medford, MA (US);
Richard J. Paolini, Jr., Framingham, MA (US);
Charles Howie Honeyman, Roslindale, MA (US);
Elizabeth Moran Gates, Somerville, MA (US);
Libing Zhang, Sharon, MA (US);
Anthony Edward Pullen, Belmont, MA (US);
Emily J. Pratt, Portsmouth, NH (US);
Kimberly L. Houde, Bethesda, MD (US);
Matthew A. King, Marina del Rey, CA (US);
Craig A. Herb, Medford, MA (US);
Richard J. Paolini, Jr., Framingham, MA (US);
E Ink Corporation, Cambridge, MA (US);
Abstract
In electrophoretic media, it is advantageous to use pigment particles having about 1 to 15 per cent by weight of a polymer chemically bonded to, or cross-linked around, the pigment particles. The polymer desirably has a branched chain structure with side chains extending from a main chain. Charged or chargeable groups can be incorporated into the polymer or can be bonded to the particles separately from the polymer. The polymer-coated particles can be prepared by first attaching a polymerizable or polymerization-initiating group to the particle and then reacting the particle with one or more polymerizable monomers or oligomers.