Patents by Inventor Birja Shanker

Birja Shanker 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).

  • Crystalline modification of propanil
    Patent number: 10689328
    Abstract: The present invention relates to crystalline modification of (3,4-dichlorophenyl)propanamide (propanil), to a process for the preparation of the same, to pesticidal mixtures and compositions comprising the crystalline modification of (3,4-dichlorophenyl)propanamide and to a method of combating weeds using said mixtures and compositions.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: June 23, 2020
    Assignee: UPL LIMITED
    Inventors: Birja Shanker, Jaidev Rajnikant Shroff, Vikram Rajnikant Shroff
  • CRYSTALLINE MODIFICATION OF PROPANIL
    Publication number: 20190248734
    Abstract: The present invention relates to crystalline modification of (3,4-dichlorophenyl)propanamide (propanil), to a process for the preparation of the same, to pesticidal mixtures and compositions comprising the crystalline modification of (3,4-dichlorophenyl)propanamide and to a method of combating weeds using said mixtures and compositions.
    Type: Application
    Filed: April 26, 2019
    Publication date: August 15, 2019
    Inventors: Birja SHANKER, Jaidev Rajnikant SHROFF, Vikram Rajnikant SHROFF
  • Crystalline modification of propanil
    Patent number: 10336685
    Abstract: The present invention relates to crystalline modification of (3,4-dichlorophenyl)propanamide (propanil), to a process for the preparation of the same, to pesticidal mixtures and compositions comprising the crystalline modification of 5 (3,4-di-chlorophenyl)propanamide and to a method of combating weeds using said mixtures and compositions.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: July 2, 2019
    Assignee: UPL LIMITED
    Inventors: Birja Shanker, Jaidev Rajnikant Shroff, Vikram Rajnikant Shroff
  • CRYSTALLINE MODIFICATION OF PROPANIL
    Publication number: 20170369423
    Abstract: The present invention relates to crystalline modification of (3,4-dichlorophenyl)propanamide (propanil), to a process for the preparation of the same, to pesticidal mixtures and compositions comprising the crystalline modification of 5 (3,4-di-chlorophenyl)propanamide and to a method of combating weeds using said mixtures and compositions.
    Type: Application
    Filed: December 31, 2015
    Publication date: December 28, 2017
    Inventors: Birja SHANKER, Jaidev Rajnikant SHROFF, Vikram Rajnikant SHROFF
  • Chiral intermediates useful for the preparation of hydroxyphosphine ligands
    Patent number: 8993788
    Abstract: A compound of formula (I), wherein R1 is hydrogen or a hydroxyl protecting group; and R2 and R3 are same or different and are independently selected from halogen or —O—SO2—X; wherein X is —C1-C4 alkyl; C1-C4 alkyl substituted with one or more halogen; or substituted or unsubstituted phenyl wherein said phenyl substituent is selected from halogen, nitro and C1-C4 alkyl; provided that when R3 is bromine, X is not p-toluoyl; and a process for the preparation thereof.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: March 31, 2015
    Assignee: UPL Limited
    Inventors: Jaidev Rajnikant Shroff, Vikram Rajnikant Shroff, Birja Shanker
  • CHIRAL INTERMEDIATES USEFUL FOR THE PREPARATION OF HYDROXYPHOSPHINE LIGANDS
    Publication number: 20130217900
    Abstract: A compound of formula (I), wherein R1 is hydrogen or a hydroxyl protecting group; and R2 and R3 are same or different and are independently selected from halogen or —O—SO2—X; wherein X is —C1-C4 alkyl; C1-C4 alkyl substituted with one or more halogen; or substituted or unsubstituted phenyl wherein said phenyl substituent is selected from halogen, nitro and C1-C4 alkyl; provided that when R3 is bromine, X is not p-toluoyl; and a process for the preparation thereof.
    Type: Application
    Filed: November 1, 2011
    Publication date: August 22, 2013
    Applicant: UNITED PHOSPHORUS LIMITED
    Inventors: Jaidev Rajnikant Shroff, Vikram Rajnikant Shroff, Birja Shanker
  • Hydrogenation of imines
    Patent number: 8461386
    Abstract: The present invention relates to a process for the asymmetric hydrogenation of imines with hydrogen under elevated pressure in the presence of a catalyst system. In particular the present invention relates to the use of the said catalytic system for the enantioselective hydrogenation of prochiral ketimines to asymmetric amines leading to the formation of herbicides.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: June 11, 2013
    Assignee: United Phosphorus Limited
    Inventors: Jaidev Rajnikant Shroff, Vikram Rajnikant Shroff, Birja Shanker
  • HYDROGENATION OF IMINES
    Publication number: 20110054217
    Abstract: The present invention relates to a process for the asymmetric hydrogenation of imines with hydrogen under elevated pressure in the presence of a catalyst system. In particular the present invention relates to the use of the said catalytic system for the enantioselective hydrogenation of prochiral ketimines to asymmetric amines leading to the formation of herbicides.
    Type: Application
    Filed: April 16, 2009
    Publication date: March 3, 2011
    Applicant: UNITED PHOSPHORUS LIMITED
    Inventors: Jaidev Rajnikant Shroff, Vikram Rajnikant Shroff, Birja Shanker