Patents by Inventor Rajendra Subhash Powale

Rajendra Subhash Powale 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).

  • Method to produce -acyl amino acid surfactants using -acyl amino acid surfactants or the corresponding anhydrides as catalysts
    Patent number: 9187407
    Abstract: A process of producing N-acyl amino acid based surfactants of Formula I, wherein, R is selected from C6 to C22 alkyl group, R1 is selected from H, C1 to C4 alkyl, R2 is selected from all groups on ? carbon of natural amino acids, R3 is selected from COOX, CH2—SO3X, X is selected from Li+, Na+ or K+. The process comprising steps of: A) preparing fatty acid chlorides by halogenating fatty acids with either phosgene or thionyl chloride in the presence of catalytic amount of same or other N-acyl amino acid surfactant of Formula I or anhydrides of same surfactant; and B) reacting fatty acid chloride of step (A) with an amino acid in the presence of a base.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: November 17, 2015
    Assignee: GALAXY SURFACTANTS LTD.
    Inventors: Nirmal Koshti, Bharat Bhikaji Parab, Rajendra Subhash Powale, Archana Kishor Desai, Kamlesh Keshwar Barai, Pradnya Mandar Katdare, Bhagyesh Jagannath Sawant, Santosh Vishnu Kadam, Srinivas Uppalaswamy Pilli
  • Method to Produce N-Acyl Amino Acid Surfactants Using N-Acyl Amino Acid Surfactants or the Corresponding Anhydrides as Catalysts
    Publication number: 20150141682
    Abstract: A process of producing N-acyl amino acid based surfactants of Formula I, wherein, R is selected from C6 to C22 alkyl group, R1 is selected from H, C1 to C4 alkyl, R2 is selected from all groups on ? carbon of natural amino acids, R3 is selected from COOX, CH2—SO3X, X is selected from Li+, Na+ or K+. The process comprising steps of: A) preparing fatty acid chlorides by halogenating fatty acids with either phosgene or thionyl chloride in the presence of catalytic amount of same or other N-acyl amino acid surfactant of Formula I or anhydrides of same surfactant; and B) reacting fatty acid chloride of step (A) with an amino acid in the presence of a base.
    Type: Application
    Filed: September 28, 2012
    Publication date: May 21, 2015
    Inventors: Nirmal Koshti, Bharat Bhikaji Parab, Rajendra Subhash Powale, Archana Kishor Desai, Kamlesh Keshwar Barai, Pradnya Mandar Katdare, Bhagyesh Jagannath Sawant, Santosh Vishnu Kadam, Srinivas Uppalaswamy Pilli