Patents by Inventor Shailendra K. Singh

Shailendra K. Singh 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).

  • Process for the preparation of pure meropenem trihydrate
    Patent number: 9000150
    Abstract: The present invention relates to a process for the preparation of pure meropenem trihydrate.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: April 7, 2015
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Prashant Kumar Sharma, Bhupendra Vashishta, Shailendra K. Singh, Neera Tiwari, Subhash Dhar
  • DSL alien noise reduction
    Patent number: 8848504
    Abstract: Alien noise is removed from one or more receptor DSL lines after self-FEXT has been eliminated or reduced. Information about the alien noise in the form of slicer errors can be obtained from one or more donor DSL lines that may or may not be in the same domain (e.g., a vectored DSL system).
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: September 30, 2014
    Assignee: Ikanos Communications, Inc.
    Inventors: Shailendra K. Singh, Kevin D. Fisher
  • UPBO for vectored DSL
    Patent number: 8817857
    Abstract: Residual FEXT resulting from intended and/or inherent partial cancellation of crosstalk in vectored DSL systems impairs upstream power back-off (UPBO) as traditionally implemented. By considering and taking into account the effects of residual crosstalk on vectored DSL system performance and operation, improved data rates and/or other vectored DSL system performance are realized through the use of UPBO parameters generated for a given residual FEXT environment.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: August 26, 2014
    Assignee: Ikanos Communications, Inc.
    Inventors: Shailendra K. Singh, Sigurd Schelstraete, Nicholas P. Sands
  • Method and apparatus for crosstalk cancellation during SELT testing
    Patent number: 8767521
    Abstract: A system for performing a single ended line test (SELT) of a selected subscriber line within a bundle of in-service subscriber lines each supporting frequency division multiplexed multi-tone modulated XDSL communications. The system comprises: a crosstalk cancellation module and a SELT module. The crosstalk cancellation module is coupled to the subscriber lines and configured to cancel crosstalk between the selected subscriber line under test and the in-service subscriber lines. The SELT module couples to the crosstalk cancellation module and is configured to coordinate SELT testing with the crosstalk cancellation module to cancel crosstalk between the selected subscriber line and the in-service subscriber lines during testing.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: July 1, 2014
    Assignee: Ikanos Communications Inc.
    Inventors: Shailendra K. Singh, Amitkumar Mahadevan, Laurent F. Alloin
  • PROCESS FOR THE PREPARATION OF PURE MEROPENEM TRIHYDRATE
    Publication number: 20130253184
    Abstract: The present invention relates to a process for the preparation of pure meropenem trihydrate.
    Type: Application
    Filed: October 21, 2011
    Publication date: September 26, 2013
    Applicant: Ranbaxy Laboratories Limited
    Inventors: Prashant Kumar Sharma, Bhupendra Vashishta, Shailendra K. Singh, Neera Tiwari, Subhash Dhar
  • DSL ALIEN NOISE REDUCTION
    Publication number: 20120093241
    Abstract: Alien noise is removed from one or more receptor DSL lines after self-FEXT has been eliminated or reduced. Information about the alien noise in the form of slicer errors can be obtained from one or more donor DSL lines that may or may not be in the same domain (e.g., a vectored DSL system).
    Type: Application
    Filed: October 14, 2011
    Publication date: April 19, 2012
    Applicant: IKANOS COMMUNICATIONS, INC.
    Inventors: Shailendra K. Singh, Kevin D. Fisher
  • Method and apparatus for crosstalk cancellation during SELT testing
    Publication number: 20110058468
    Abstract: A system for performing a single ended line test (SELT) of a selected subscriber line within a bundle of in-service subscriber lines each supporting frequency division multiplexed multi-tone modulated XDSL communications. The system comprises: a crosstalk cancellation module and a SELT module. The crosstalk cancellation module is coupled to the subscriber lines and configured to cancel crosstalk between the selected subscriber line under test and the in-service subscriber lines. The SELT module couples to the crosstalk cancellation module and is configured to coordinate SELT testing with the crosstalk cancellation module to cancel crosstalk between the selected subscriber line and the in-service subscriber lines during testing.
    Type: Application
    Filed: September 8, 2010
    Publication date: March 10, 2011
    Inventors: Shailendra K. Singh, Amitkumar Mahadevan, Laurent F. Alloin
  • Process for P-nitrobenzyl ester cleavage in cephalosporin
    Patent number: 5536830
    Abstract: A process for converting cephalosporin p-nitrobenzyl ester (Formula I) to the corresponding cephalosporin free acid (Formula II) comprising treating the cephalosporin p-nitrobenzyl ester with a metal selected from the group consisting of iron, magnesium, aluminum, and tin, and with hydrochloric acid in a mixture of water and a water-miscible organic solvent. Preferably, the metal is iron in the form of a fine powder, and the reaction is carried out at a temperature in the range of 30.degree.-50.degree. C.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: July 16, 1996
    Assignee: Ranbaxy Laboratories, Ltd.
    Inventors: Jag M. Khanna, Yatendra Kumar, Rakesh K. Arora, Neera Tiwari, Shailendra K. Singh