Patents Assigned to Hopkinson Associates, Inc.
  • Electrosensitive media and recording process
    Patent number: 4596635
    Abstract: An electrochromic material containing a hydrosoluble salt or a hydrosoluble mixture of salts of at least one metal cathodically depositable from an aqueous solution of its ions, an initially hydrosoluble film-forming polymer resin and water is developed by cathodic reduction of at least one depositable metal ion present within the electrochromic material at a point where a visible mark is desired.
    Type: Grant
    Filed: August 26, 1985
    Date of Patent: June 24, 1986
    Assignee: Hopkinson Associates, Inc.
    Inventor: Bernard Warszawski
  • Electrosensitive media and recording process
    Patent number: 4596722
    Abstract: A process for manufacturing electrochromic recording materials, useful for recording signals and images, is carried out by coating a suitable substrate with a homogeneous fluid mixture of a hydrosoluble salt of a metal cathodically depositable from an aqueous solution of its ions and an initially hydrosoluble film-forming polymer resin, in water. The recording mediums of the invention are advantageous for generating images whose background and marks remain unaffected by light, heat and humidity.
    Type: Grant
    Filed: August 26, 1985
    Date of Patent: June 24, 1986
    Assignee: Hopkinson Associates Inc.
    Inventor: Bernard Warszawski