Patents by Inventor Sanjoy Kumar

Sanjoy Kumar 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: 7402608
    Abstract: Compounds represented by formula: wherein X, Y and Z are as defined herein, pharmaceutically acceptable salts thereof, and related compounds, are suitable for use in treating or preventing a Flaviviridae viral infection in a host.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: July 22, 2008
    Assignee: ViroChem Pharma Inc.
    Inventors: Laval Chan Chun Kong, Sanjoy Kumar Das, Nghe Nguyen-Ba, Liliane Halab, Oswy Z. Pereira, Carl Poisson, Melanie Proulx, Thumkunta Jagadeeswar Reddy, Zhang Ming-Qiang
  • Patent number: 6936629
    Abstract: The present invention provides novel compounds represented by formula I: or pharmaceutically acceptable salts thereof useful for treating flaviviridae viral infection.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: August 30, 2005
    Assignee: ViroChem Pharma Inc.
    Inventors: Laval Chan Chun Kong, Oswy Z. Pereira, Nghe Nguyen-Ba, Thumkunta Jagadeeswar Reddy, Sanjoy Kumar Das, Mohammad Arshad Siddiqui
  • Patent number: 6900257
    Abstract: An antistatic additive comprises a quaternary onium organosilicon compound having the formula (I) wherein each R1 independently comprises an aliphatic or aromatic functional groups that may be substituted or unsubstituted; X comprises phosphorus or nitrogen; each R2 independently comprises an aliphatic or aromatic functional group that may be substituted or unsubstituted; each R3 independently comprises a hydrogen or an aliphatic or aromatic functional group that may be substituted or unsubstituted; and “n” has a value of about 1 to about 20.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: May 31, 2005
    Assignee: General Electric Company
    Inventors: Sanjoy Kumar Chowdhury, Theodorus Lambertus Hoeks
  • Patent number: 6887877
    Abstract: The present invention provides novel compounds represented by formula I: or pharmaceutically acceptable salts thereof useful for treating Flaviviridae viral infection.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: May 3, 2005
    Assignee: ViroChem Pharma Inc.
    Inventors: Laval Chan Chun Kong, Jean Bedard, Sanjoy Kumar Das, Nghe Nguyen Ba, Oswy Z. Pereira, Stephen Joseph Shuttleworth, Mohammad Arshad Siddiqui, Wuyi Wang
  • Patent number: 6881741
    Abstract: The present invention provides novel compounds represented by formula I: or pharmaceutically acceptable salts thereof useful for treating flaviviridae viral infection.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: April 19, 2005
    Assignee: ViroChem Pharma Inc.
    Inventors: Laval Chan Chun Kong, Jean Bedard, Sanjoy Kumar Das, Nghe Nguyen Ba, Oswy Z. Pereira, Thumkunta Jagadeeswar Reddy, Mohammad Arshad Siddiqui, Wuyi Wang, Constanin Yannopoulos
  • Patent number: 6841598
    Abstract: A quaternary onium aromatic sulfonate represented by the formula: wherein each R1 independently comprises substituted or unsubstituted, aliphatic or aromatic, hydrocarbyl, carbocyclic or heterocyclic radicals, each X is selected from the group consisting of phosphorus and nitrogen; wherein “a” has a value of 0, 1 or 2, and “b” has a value of 0 or 1 with the proviso that (a+b) is equal to 1 or 2; G1 is an aromatic group; E comprises a bis(carbonyloxyalkyl) polydiorganosiloxane, a bis (carbonyloxyaryl) polydiorganosiloxane, and an ether linkage; each Y independently comprises hydrogen, a monovalent hydrocarbon group, alkenyl, allyl, halogen, bromine, chlorine; nitro; and OR, wherein R is a monovalent hydrocarbon group; “q” represents any integer from and including zero through the number of positions on G1 available for substitution; “t” represents an integer equal to at least one; “s” represents an integer equal to either zero or one; and “u” represents any integer including zero; with the proviso that whe
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: January 11, 2005
    Assignee: General Electric Company
    Inventors: Sanjoy Kumar Chowdhury, Prakash P. Wadgaonkar, Theodorus Lambertus Hoeks, Alex Bernard Scholten, Suresh K. Rajaraman, Bhimrao D. Sarwade, Chilukuri Ver Avadhani
  • Publication number: 20040192707
    Abstract: Compounds represented by formula I: 1
    Type: Application
    Filed: December 9, 2003
    Publication date: September 30, 2004
    Inventors: Laval Chan Chun Kong, Oswy Z. Pereira, Nghe Nguyen-Ba, Ming-Qiang Zhang, Sanjoy Kumar Das, Carl Poisson, Thumkunta Jagadeeswar Reddy, Liliane Halab
  • Publication number: 20040116509
    Abstract: The present invention provides novel compounds represented by formula I: 1
    Type: Application
    Filed: June 11, 2002
    Publication date: June 17, 2004
    Applicant: Shire BioChem Inc.
    Inventors: Laval Chan Chun Kong, Jean Bedard, Sanjoy Kumar, Nghe Nguyen Ba, Oswy Z. Pereira, Thumkunta Jagadeeswar Reddy, Mohammad Arshad Siddiqui, Wuyi Wang, Constantin Yannopoulos
  • Publication number: 20040034131
    Abstract: A quaternary onium aromatic sulfonate represented by the formula: 1
    Type: Application
    Filed: August 16, 2002
    Publication date: February 19, 2004
    Applicant: General Electric Company
    Inventors: Sanjoy Kumar Chowdhury, Prakash P. Wadgaonkar, Theodorus Lambertus Hoeks, Alex Bernard Scholten, Suresh K. Rajaraman, Bhimrao D. Sarwade, Chilukuri Ver Avadhani
  • Publication number: 20040030015
    Abstract: An antistatic additive comprises a quaternary onium organosilicon compound having the formula (I) 1
    Type: Application
    Filed: August 6, 2002
    Publication date: February 12, 2004
    Inventors: Sanjoy Kumar Chowdhury, Theodorus Lambertus Hoeks
  • Publication number: 20030229053
    Abstract: the present invention provides novel compounds represented by formula I: 1
    Type: Application
    Filed: June 11, 2002
    Publication date: December 11, 2003
    Applicant: Shire BioChem Inc.
    Inventors: Laval Chan Chun Kong, Jean Bedard, Sanjoy Kumar Das, Nghe Nguyen Ba, Oswy Z. Pereira, Stephen Joseph Shuttleworth, Mohammad Arshad Siddiqui, Wuyi Wang
  • Publication number: 20030199503
    Abstract: The present invention provides novel compounds represented by formula I: 1
    Type: Application
    Filed: December 20, 2002
    Publication date: October 23, 2003
    Applicant: Shire BioChem Inc.
    Inventors: Laval Chan Chun Kong, Oswy Z. Pereira, Nghe Nguyen-Ba, Thumkunta Jagadeeswar Reddy, Sanjoy Kumar Das, Mohammad Arshad Siddiqui
  • Patent number: 6556556
    Abstract: An improved method and system for limiting data packet transmission within a digital mobile telephone communication network, such as a code division multiple access (CDMA) mobile telephone communication network, by discarding unsuccessfully transmitted radio link protocol frames is disclosed. A code division multiple access (CDMA) mobile telephone communication network includes a mobile telephone, a base station, a mobile switching center, and a network Interworking Function. Within the CDMA mobile telephone communication network, each point-to-point protocol data packet is typically divided into multiple radio link protocol frames before their transmissions over an air link. In accordance with a method and system of the present invention, a marker bit is provided for each of the radio link protocol frames. The marker bit can be part of the frame header and will be removed before air link transmission.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: April 29, 2003
    Assignee: Nortel Networks Limited
    Inventors: Sanjoy Kumar Sen, Arun Arunachalam, Kalyan Basu
  • Patent number: 6258335
    Abstract: A device comprised of three modular parts (A, B, C) is described here, which allows fixation of carbon dioxide on an acceptor molecule and recycling of the acceptor. This device allows fixation of carbon dioxide from internal combustion engine (ICE) exhausts. In module A of the device, carbon dioxide from the exhausts is fixed onto a five carbon molecule, Ribulose 1,5-bis-phosphate (RuBP) and simultaneously converted into a soluble three-carbon molecule, 3-Phosphoglyceraldehyde. Module B is comprised of a solar panel and a chamber employing a biocatalyst allowing formation of an organic molecule (ATP) that could be used in subsequent steps. ATP generated in module B and 3-Phosphoglycerate generated in module A is used in module C of the device to regenerate Ribulose 1,5-bisphosphate. RuBP generated in module C is used in the first step of carbon dioxide fixation (in module A).
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: July 10, 2001
    Inventor: Sanjoy Kumar Bhattacharya