Patents by Inventor P. Veeraraghavan Ramachandran

P. Veeraraghavan Ramachandran 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: 10384994
    Abstract: The present disclosure generally relates to a process for hydroboration of an alkene or alkyne using ammonia borane (AB). In particular, the present invention relates to hydroboration of an alkene or alkyne in the presence of air or moisture, and a clean process for facile preparation of an alcohol by oxidizing the organoborane so formed with hydrogen peroxide. The products, including aminodialkylboranes, ammonia trialkylborane complexes, as well as various alcohols so prepared, are within the scope of this disclosure.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: August 20, 2019
    Assignee: Purdue Research Foundation
    Inventors: P Veeraraghavan Ramachandran, Ameya Sanjay Kulkarni, Michael Patrick Drolet
  • Publication number: 20180244698
    Abstract: Disclosed herein is the preparation of functional group containing amine-boranes from the corresponding amines. The mild reaction conditions allow for the direct preparation of several hitherto inaccessible amine-boranes containing a functional moiety, such as but not limited to, alkene, alkyne, hydroxyl, thiol, acetal, ester, amide, nitrile, nitro, and alkoxysilane.
    Type: Application
    Filed: April 27, 2018
    Publication date: August 30, 2018
    Applicant: Purdue Research Foundation
    Inventors: P Veeraraghavan Ramachandran, Ameya Sanjay Kulkarni
  • Patent number: 9988402
    Abstract: Disclosed herein is the preparation of functional group containing amine-boranes from the corresponding amines. The mild reaction conditions allow for the direct preparation of several hitherto inaccessible amine-boranes containing a functional moiety, such as but not limited to, alkene, alkyne, hydroxyl, thiol, acetal, ester, amide, nitrile, nitro, and alkoxysilane.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: June 5, 2018
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: P Veeraraghavan Ramachandran, Ameya Sanjay Kulkarni
  • Publication number: 20180076403
    Abstract: The present invention relates to a process for functionalizing a surface of semi-conductors, conductors, and dielectrics using an amine-borane bearing a functionality from a group of, but not limited to, alkene, alkyne, hydroxyl, thiol, acetal, ester, amide, nitrile, nitro, or alkoxysilane, under a mild condition. Products of this facile process are also in the scope of this disclosure.
    Type: Application
    Filed: August 18, 2017
    Publication date: March 15, 2018
    Applicant: Purdue Research Foundation
    Inventors: P. Veeraraghavan Ramachandran, Ameya Sanjay Kulkarni, Jianguo Mei, Yan Zhao
  • Publication number: 20180050972
    Abstract: The present disclosure generally relates to a process for hydroboration of an alkene or alkyne using ammonia borane (AB). In particular, the present invention relates to hydroboration of an alkene or alkyne in the presence of air or moisture, and a clean process for facile preparation of an alcohol by oxidizing the organoborane so formed with hydrogen peroxide. The products, including aminodialkylboranes, ammonia trialkylborane complexes, as well as various alcohols so prepared, are within the scope of this disclosure.
    Type: Application
    Filed: August 18, 2017
    Publication date: February 22, 2018
    Applicant: Purdue Research Foundation
    Inventors: P Veeraraghavan Ramachandran, Ameya Sanjay Kulkarni, Michael Patrick Drolet
  • Publication number: 20180051040
    Abstract: Disclosed herein is the preparation of functional group containing amine-boranes from the corresponding amines. The mild reaction conditions allow for the direct preparation of several hitherto inaccessible amine-boranes containing a functional moiety, such as but not limited to, alkene, alkyne, hydroxyl, thiol, acetal, ester, amide, nitrile, nitro, and alkoxysilane.
    Type: Application
    Filed: August 18, 2017
    Publication date: February 22, 2018
    Applicant: Purdue Research Foundation
    Inventors: P. Veeraraghavan Ramachandran, Ameya Sanjay Kulkarni
  • Patent number: 9834448
    Abstract: Disclosed herein is a method for preparing amine-boranes.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: December 5, 2017
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: P Veeraraghavan Ramachandran, Ameya Sanjay Kulkarni
  • Publication number: 20160101984
    Abstract: Disclosed herein is a method for preparing amine-boranes.
    Type: Application
    Filed: October 9, 2015
    Publication date: April 14, 2016
    Applicant: PURDUE RESEARCH FOUNDATION
    Inventors: P Veeraraghavan Ramachandran, Ameya Sanjay Kulkarni
  • Patent number: 7601797
    Abstract: Methods of controlled hydrolysis/alcoholysis and regeneration of a borohydride are disclosed. Examples of the present invention show that hydrolysis of sodium borohydride or lithium borohydride with dilute acid provides simultaneous generation of H2 and boric acid for recycling. Other examples of the present invention show methods for regenerating a borohydride by reacting an aluminum hydride to a borate compound to provide a regenerated borohydride.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: October 13, 2009
    Assignee: Purdue Research Foundation
    Inventors: P. Veeraraghavan Ramachandran, Debasis Hazra, Bhimapaka China Raju, Venkatram Reddy Mereddy, Annyt Bhattacharyya
  • Patent number: 7456324
    Abstract: The invention includes methods for preparing halohydrins and epoxides. A method of preparing halohydrins can include exposing (R1CHXCH2O—)2SO2 to R2COOH to produce R1CHXCH2COOR2 and hydrolyzing the R1CHXCH2COOR2 to produce the halohydrin R1CHXCH2OH. R1 and R2 can be the same or different single elements and/or organic groups and X can be a halogen. A method of preparing an epoxide can include combining a sulfuric acid containing solution with a halogen to produce a first mixture and exposing the first mixture to trifluoropropene to produce a second mixture. The second mixture can be combined with acetic acid to produce an acetyl halohydrin of trifluoropropene and the acetyl halohydrin can be hydrolyzed to form a halohydrin of trifluoropropene. The halohydrin can be converted to a trifluoropropyl epoxide.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: November 25, 2008
    Assignee: Great Lakes Chemical Corp.
    Inventors: P. Veeraraghavan Ramachandran, Kamlesh J. Padiya, Venkatram R. Mereddy