Patents by Inventor Syamal Kumar Ghosh

Syamal Kumar Ghosh 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).

  • Patent number: 8209887
    Abstract: The present invention relates to a wear shoe for use with utility equipment comprising a unitary housing having therein at least one cavity containing a wear resistant insert bound within the unitary housing and methods for making the same. Most preferably, the wear resistant insert is a ceramic material.
    Type: Grant
    Filed: June 12, 2010
    Date of Patent: July 3, 2012
    Inventor: Syamal Kumar Ghosh
  • Patent number: 6156246
    Abstract: An improved method for injection molding fine particulate inorganic materials that first spray dries a fine particulate inorganic material and then mixes the dried particulate inorganic material with a binder system to form a compounded material. The compounded material is then injected, at a low pressure into a mold to form a green part. The green part is then debinded to remove most of the binder system and the debinded green part is then sintered to form the final molded part.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: December 5, 2000
    Assignee: Eastman Kodak Company
    Inventors: Dilip Kumar Chatterjee, Syamal Kumar Ghosh, William Joseph Hutchinson
  • Patent number: 6117805
    Abstract: Ceramic guide rails for guiding photographic film into a perforating machine are disclosed. The ceramic includes zirconium oxide and yttria in a molar ratio of yttria to zirconium oxide of from about 3:97 to about 5:95. The zirconium oxide is essentially the tetragonal phase crystal grain. In an alternate embodiment of the present invention the outer surface of the zirconium oxide is altered to the cubic phase crystal grain or the monoclinic crystal grain.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: September 12, 2000
    Assignee: Eastman Kodak Company
    Inventors: Syamal Kumar Ghosh, Dilip Kumar Chatterjee, Theodore R. Kolb
  • Patent number: 5870956
    Abstract: Lithographic printing is carried out by a novel process utilizing a zirconia ceramic as a printing plate. In this process, the surface of the zirconia ceramic printing plate is imagewise exposed to radiation which transforms it from a hydrophilic to an oleophilic state or from an oleophilic to a hydrophilic state, thereby creating a lithographic printing surface which is hydrophilic in non-image areas and is oleophilic and thus capable of accepting printing ink in image areas. The zirconia ceramic printing plate utilized in this process is capable of extremely long printing runs, is especially well adapted for direct digital laser imaging using images that are electronically captured and digitally stored, and can be reused by erasing the image from the ceramic surface by thermally-activated oxidation or laser-assisted oxidation.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: February 16, 1999
    Assignee: Eastman Kodak Company
    Inventors: Syamal Kumar Ghosh, Dilip Kumar Chatterjee, Donald Michael Korn, Nicoletta Assaro Zongrone, Mark Anthony Harris
  • Patent number: 5840134
    Abstract: A functionally gradient permanent magnet is formed as a slab of alloy comprised of a rare earth-transition metal-boron, and areas of a diffused transition metal positioned at points along the length of at least one surface of the slab of alloy.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: November 24, 1998
    Assignee: Eastman Kodak Company
    Inventors: Edward Paul Furlani, Syamal Kumar Ghosh, Dilip Kumar Chatterjee
  • Patent number: 5743188
    Abstract: Lithographic printing is carried out by a novel process utilizing a zirconia ceramic as a printing plate. In this process, the surface of the zirconia ceramic printing plate is imagewise exposed to radiation which transforms it from a hydrophilic to an oleophilic state or from an oleophilic to a hydrophilic state, thereby creating a lithographic printing surface which is hydrophilic in non-image areas and is oleophilic and thus capable of accepting printing ink in image areas. The zirconia ceramic printing plate utilized in this process is capable of extremely long printing runs, is especially well adapted for direct digital laser imaging using images that are electronically captured and digitally stored, and can be reused by erasing the image from the ceramic surface by thermally-activated oxidation or laser-assisted oxidation.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: April 28, 1998
    Assignee: Eastman Kodak Company
    Inventors: Syamal Kumar Ghosh, Dilip Kumar Chatterjee, Donald Michael Korn, Nicoletta Assaro Zongrone, Mark Anthony Harris
  • Patent number: 5716461
    Abstract: A functionally gradient permanent magnet is formed as a slab of alloy comprised of a rare earth-transition metal-boron, and areas of a diffused transition metal positioned at points along the length of at least one surface of the slab of alloy.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: February 10, 1998
    Assignee: Eastman Kodak Company
    Inventors: Edward Paul Furlani, Syamal Kumar Ghosh, Dilip Kumar Chatterjee
  • Patent number: 5683649
    Abstract: Micro-electromechanical ceramic parts are formed using green ceramic and a sacrificial material that has a higher melting temperature than the sintering temperature of the green ceramic to form electrical trace paths. After the sintering of the ceramic part the sacrificial material is removed by etching or by elevating the temperature of the part above the melting temperature of the sacrificial material. The void left by the removal of the sacrificial material is then filled with a molten metal which when cooled forms the electrical trace for the fabricated part.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: November 4, 1997
    Assignee: Eastman Kodak Company
    Inventors: Dilip Kumar Chatterjee, Edward Paul Furlani, Syamal Kumar Ghosh