Patents by Inventor Daniel C. Tanchangco

Daniel C. Tanchangco has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cleaner rollers and cleaning electrophotographic photoconductors
    Patent number: 11906925
    Abstract: Herein is described a liquid electrophotographic a printing apparatus comprising: a photoconductor; a liquid electrophotographic ink developer unit for applying liquid electrophotographic ink to the photoconductor; a cleaner roller contactable with the photoconductor, the cleaner roller comprising an open-celled foam material having thereon a coating comprising abrasive particles and a binder. Also described herein is a cleaner roller for cleaning a liquid electrophotographic printing apparatus' photoconductor and a method of operating a liquid electrophotographic printing apparatus using a cleaner roller described herein.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: February 20, 2024
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Bin Huang, Minedys Macias Guzman, Daniel C. Tanchangco
  • DEVELOPER ROLLER
    Publication number: 20230400790
    Abstract: Disclosed is a developer roller comprising a first section comprising a first exterior surface, wherein the first exterior surface comprises an electrically-conductive material; and a second section comprising a second exterior surface, wherein the second exterior surface is non-electrically-conductive. The second section is axially aligned with the first section and provided at a first longitudinal end of the first section.
    Type: Application
    Filed: October 16, 2020
    Publication date: December 14, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey ZAMPELL, Daniel C. TANCHANGCO, Jingzhi LU
  • CLEANER ROLLERS AND CLEANING ELECTROPHOTOGRAPHIC PHOTOCONDUCTORS
    Publication number: 20230147465
    Abstract: Herein is described a liquid electrophotographic a printing apparatus comprising: a photoconductor; a liquid electrophotographic ink developer unit for applying liquid electrophotographic ink to the photoconductor; a cleaner roller contactable with the photoconductor, the cleaner roller comprising an open-celled foam material having thereon a coating comprising abrasive particles and a binder. Also described herein is a cleaner roller for cleaning a liquid electrophotographic printing apparatus’ photoconductor and a method of operating a liquid electrophotographic printing apparatus using a cleaner roller described herein.
    Type: Application
    Filed: April 8, 2020
    Publication date: May 11, 2023
    Inventors: Bin Huang, Minedys Macias Guzman, Daniel C. Tanchangco