Patents by Inventor Jun Naitoh

Jun Naitoh 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).

  • Photographic printing paper support
    Patent number: 5474856
    Abstract: A photographic printing paper support which comprises a raw paper coated with a film-forming resin on both sides; said raw paper being a paper made from paper stock comprising (i) cationic starch, (ii) polyamidepolyamine epichlorohydrin and (iii) an epoxidized higher fatty acid amide and/or an alkylketene dimer, and optionally (iv) a metal salt of carboxymethyl cellulose and/or an acrylamide/diallylamine salt copolymer, and being adjusted to pH 6.5-8.5 and controlled so as to have a zeta potential in the range of -10 mV to +5 mV.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: December 12, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shigehisa Tamagawa, Shinichiro Serizawa, Jun Naitoh