Patents by Inventor Csaba Andras Kovacs

Csaba Andras Kovacs 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).

  • Thicker optical recording layers comprising a tetra dye having a metallized azo dianionic dye with cationic dye counterions
    Patent number: 6361922
    Abstract: The present invention discloses optical recording elements having optical recording layers containing tetra dyes. The dyes have metallized azo dianionic dye with cationic dye counterions. The recording layer has a thickness from 225 to 300 nm.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: March 26, 2002
    Assignee: Eastman Kodak Company
    Inventors: Derek David Chapman, James C. Fleming, Ramanuj Goswami, Csaba Andras Kovacs
  • Metallized azo-ether dyes for optical recording layers
    Patent number: 6165683
    Abstract: A metallized azo-ether dye comprising an azo group linking a substituted 3-hydroxy-pyridine nucleus to a phenyl nucleus wherein the phenyl nucleus has an alkoxy or thioether substituent at its 2-position. The dye is useful in the recording layers of optical recording elements.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: December 26, 2000
    Assignee: Eastman Kodak Company
    Inventors: Derek D. Chapman, Ramanuj Goswami, Csaba Andras Kovacs
  • Method of providing a range of conformalities for optical recording layers
    Patent number: 5959960
    Abstract: A method of coating an optical recording layer on a transparent grooved substrate is disclosed. The recording layer is coated from a mixture of a primary and a secondary solvent. The solvent mixture provides a wide range of conformalities for optical recording layers.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: September 28, 1999
    Assignee: Eastman Kodak Company
    Inventors: Susan Starr Collier, Michael Paul Cunningham, Csaba Andras Kovacs
  • Tetra dye mixed with another dye or dyes for optical recording elements
    Patent number: 5876821
    Abstract: A dye mixture having, at 780 nm, a real refractive index not less than 1.8, and an imaginary part not greater than 0.15 and comprising (a) a tetra dye having a metallized azo dianionic dye with a cationic dye counterion and (b) at least one other dye having the structure according to formula I: ##STR1## wherein: A may be equal to or different from A.sup.1, in which each represents an aryl group having 6 to 10 carbon atoms;B may be equal to or different from B.sup.1, in which each ##STR2## R and R.sup.1 represent an alkyl group of C.sub.1 -C.sub.10 or an aryl group having 6 to 10 carbon atoms; andX represents halide, ClO.sub.4, BF.sub.4, PF.sub.6, tosylate and RCOO.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: March 2, 1999
    Assignee: Eastman Kodak Company
    Inventors: Derek David Chapman, James C Fleming, Ramanuj Goswami, Csaba Andras Kovacs
  • Polymeric dyes for optical recording layers and elements
    Patent number: 5824768
    Abstract: There is disclosed a recordable optical element that includes a polymeric dye. The element has a transparent substrate and on the surface of the substrate, a polymeric dye containing recording layer and a light reflective layer. The improvement is that polymeric dyes are used in the element, which improve the recording layer's cohesion and the adhesion to the substrate and the reflective layer.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: October 20, 1998
    Assignee: Eastman Kodak Company
    Inventors: Elizabeth Gertrude Burns, Csaba Andras Kovacs, Ramanuj Goswami, Derek D. Chapman
  • Optical recording elements comprising a polymeric dye
    Patent number: 5786123
    Abstract: There is disclosed a recordable optical element that includes a polymeric dye. The element has a transparent substrate and on the surface of the substrate, a polymeric dye containing recording layer and a light reflective layer. The improvement is that polymeric dyes are used in the element, which improve the recording layer's cohesion and the adhesion to the substrate and the reflective layer.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: July 28, 1998
    Assignee: Eastman Kodak Company
    Inventors: Elizabeth Gertrude Burns, Csaba Andras Kovacs, Ramanuj Goswami, Derek D. Chapman
  • Formazan-cyanine copolymers dyes for optical recording layers and elements
    Patent number: 5645910
    Abstract: A copolymer comprising 70 to 100 mole percent of repeating units comprising a formazan dye radical and a cyanine dye radical. The copolymers are useful in recording layers of optical recording elements.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: July 8, 1997
    Assignee: Eastman Kodak Company
    Inventors: Elizabeth Gertrude Burns, Ramanuj Goswami, Csaba Andras Kovacs