Patents by Inventor Grigory Ya. Mazo

Grigory Ya. Mazo 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).

  • Solution polymerizing aspartic acid and monomer to form succinimide copolymer
    Patent number: 6399715
    Abstract: A method for the preparation of a succinimide copolymer by the catalytic co-polymerization of aspartic acid with a selected polyfunctional monomer in the presence of a cyclic carbonate solvent. Succinimide copolymers of relatively high weight average molecular weight and high purity can be produced in relatively high yields while employing a relatively low catalyst loading.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: June 4, 2002
    Assignee: Donlar Corporation
    Inventors: Grigory Ya. Mazo, Robert J. Ross, James F. Kneller, Jacob Mazo
  • Version with markings to show changes
    Publication number: 20010012882
    Abstract: A method for the preparation of a succinimide copolymer by the catalytic co-polymerization of aspartic acid with a selected polyfunctional monomer in the presence of a cyclic carbonate solvent. Succinimide copolymers of relatively high weight average molecular weight and high purity can be produced in relatively high yields while employing a relatively low catalyst loading.
    Type: Application
    Filed: March 5, 2001
    Publication date: August 9, 2001
    Applicant: Donlar Corporation
    Inventors: Grigory Ya. Mazo, Robert J. Ross, James F. Kneller, Jacob Mazo
  • Production of succinimide copolymers in cyclic carbonate solvent
    Patent number: 6197897
    Abstract: A method for the preparation of a succinimide copolymer by the catalytic co-polymerization of aspartic acid with a selected polyfunctional monomer in the presence of a cyclic carbonate solvent. Succinimide copolymers of relatively high weight average molecular weight and high purity can be produced in relatively high yields while employing a relatively low catalyst loading.
    Type: Grant
    Filed: July 20, 1999
    Date of Patent: March 6, 2001
    Assignee: Donlar Corporation
    Inventors: Grigory Ya. Mazo, Robert J. Ross, James F. Kneller, Jacob Mazo
  • Production of polysuccinimide and derivatives thereof in a sulfur-containing solvent
    Patent number: 6005069
    Abstract: Polysuccinimide of varying molecular weight has been prepared in a solvent system by heat polymerization of aspartic acid. The solvent system includes a sulfur oxygen acid and a sulfur oxygen acid salt. In a preferred embodiment, aspartic acid is polymerized in a liquid solvent reaction mixture at a temperature in the range of about 110.degree. C. to about 320.degree. C.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: December 21, 1999
    Assignee: Donlar Corporation
    Inventors: Grigory Ya. Mazo, Jacob Mazo
  • Production of succinimide copolymers in cyclic carbonate solvent
    Patent number: 5939517
    Abstract: A method for the preparation of a succinimide copolymer by the catalytic co-polymerization of aspartic acid with a selected polyfunctional monomer in the presence of a cyclic carbonate solvent. Succinimide copolymers of relatively high weight average molecular weight and high purity can be produced in relatively high yields while employing a relatively low catalyst loading.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: August 17, 1999
    Assignee: Donlar Corporation
    Inventors: Grigory Ya. Mazo, Robert J. Ross, James F. Kneller, Jacob Mazo
  • Production of polysuccinimide and polyaspartate in thioether solvents
    Patent number: 5939522
    Abstract: A method for the preparation of a desired molecular weight polysuccinimide by the catalytic polymerization of aspartic acid in the presence of a thioether solvent. Polysuccinimide of relatively high weight average molecular weight and high purity can be produced in relatively high yields while employing a relatively low catalyst loading and relatively low temperatures.
    Type: Grant
    Filed: September 5, 1997
    Date of Patent: August 17, 1999
    Assignee: Donlar Corporation
    Inventors: Grigory Ya. Mazo, Jacob Mazo, Barney Vallino, Robert J. Ross
  • Polyaspartate (salt) by polymerizing aspartic acid and hydrolyzing
    Patent number: 5939518
    Abstract: A method for the preparation of a desired molecular weight polysuccinimide by the catalytic polymerization of aspartic acid in the presence of a cyclic carbonate solvent. Polysuccinimide of relatively high weight average molecular weight and high purity can be produced in relatively high yields while employing a relatively low catalyst loading.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: August 17, 1999
    Assignee: Donlar Corporation
    Inventors: Grigory Ya. Mazo, Daniel A. Batzel, James F. Kneller, Jacob Mazo
  • Production of D,L-aspartic acid
    Patent number: 5907057
    Abstract: The present invention is directed to a method for the production of D,L-aspartic acid. The method comprises reacting an unsaturated dicarboxylic acid or anhydride, such as, maleic acid, fumaric acid, maleic anhydride, or mixtures thereof, with excess aqueous ammonia at an elevated temperature and pressure for a time sufficient to produce diammonium D,L-aspartate. The produced diammonium D,L-aspartate is then neutralized to D,L-aspartic acid. Excess unreacted ammonia and various by-products may be recycled and re-used in the method, thereby minimizing waste and reducing cost. The produced D,L-aspartic acid may be subsequently used to make polyaspartic acid.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: May 25, 1999
    Assignee: Donlar Corporation
    Inventors: Grigory Ya. Mazo, Jacob Mazo, Barney Vallino, Jr., Robert J. Ross
  • Production of D,L-aspartic acid
    Patent number: 5872285
    Abstract: The present invention is directed to a method for the production of D,L-aspartic acid. The method comprises reacting an unsaturated dicarboxylic acid or anhydride, such as, maleic acid, fumaric acid, maleic anhydride, or mixtures thereof, with excess aqueous ammonia at an elevated temperature and pressure for a time sufficient to produce diammonium D,L-aspartate. The produced diammonium D,L-aspartate is then neutralized to D,L-aspartic acid. Excess unreacted ammonia and various by-products may be recycled and re-used in the method, thereby minimizing waste and reducing cost. The produced D,L-aspartic acid may be subsequently used to make polyaspartic acid.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: February 16, 1999
    Assignee: Donlar Corporation
    Inventors: Grigory Ya Mazo, Jacob Mazo, Barney Vallino, Jr., Robert J. Ross
  • Production of polysuccinimide in cyclic carbonate solvent
    Patent number: 5756595
    Abstract: A method for the preparation of a desired molecular weight polysuccinimide by the catalytic polymerization of aspartic acid in the presence of a cyclic carbonate solvent. Polysuccinimide of relatively high weight average molecular weight and high purity can be produced in relatively high yields while employing a relatively low catalyst loading.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: May 26, 1998
    Assignee: Donlar Corporation
    Inventors: Grigory Ya Mazo, Daniel A. Batzel, James F. Kneller, Jacob Mazo