Patents by Inventor Nathan Ravi

Nathan Ravi 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: 8877227
    Abstract: The present invention relates to reversible hydrogel systems. Particularly, the hydrogel of the present invention is made up of copolymers that can be a hydrogel when in an oxidized state and can be a solution when in a reduced state. A solution of the copolymer can be oxidized to form a hydrogel; and the hydrogel can be reduced to form a solution of the copolymer. Reversible nanogels can also be formed from a dilute solution of the copolymers. The hydrogel is formed with nanoparticles embedded therein to form a nanocomposite whose refractive index and modulus can be controlled by varying the amounts of nanoparticles and the polymer concentration of the hydrogel, respectively.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: November 4, 2014
    Assignee: The United States of America, as represented by the Department of Veterans Affairs
    Inventor: Nathan Ravi
  • Patent number: 8192485
    Abstract: The present invention relates to reversible hydrogel systems for medical applications. Particularly, the hydrogel of the present invention is made up of copolymers that can be a hydrogel when in an oxidized state and can be a solution when in a reduced state. A solution of the copolymer can be oxidized to form a hydrogel; and the hydrogel can be reduced to form a solution of the copolymer. The solution can be dehydrated to produce the dry copolymer for storage. Furthermore, the present invention also relates to methods of making and using the reversible hydrogel systems.
    Type: Grant
    Filed: November 13, 2003
    Date of Patent: June 5, 2012
    Assignees: The United States of America, as represented by the Department of Veterens Affairs, The Washington University in St. Louis
    Inventor: Nathan Ravi
  • Patent number: 8153156
    Abstract: The present invention relates to reversible hydrogel systems. Particularly, the hydrogel of the present invention is made up of copolymers that can be a hydrogel when in an oxidize state and can be a solution when in a reduced state. A solution of the copolymer can be oxidized to form a hydrogel; and the hydrogel can be reduced to form a solution of the copolymer. Reversible nanogels can also be formed from a dilute solution of the copolymers. The hydrogel is formed with nanoparticles embedded therein to form a nanocomposite whose refractive index and modulus can be controlled by varying the amounts of nanoparticles and the polymer concentration of the hydrogel, respectively.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: April 10, 2012
    Assignees: The United States of America as Represented by the Department of Veteran Affairs, The Washington University in St. Louis
    Inventor: Nathan Ravi
  • Publication number: 20110144228
    Abstract: The present invention relates to reversible hydrogel systems. Particularly, the hydrogel of the present invention is made up of copolymers that can be a hydrogel when in an oxidized state and can be a solution when in a reduced state. A solution of the copolymer can be oxidized to form a hydrogel; and the hydrogel can be reduced to form a solution of the copolymer. Reversible nanogels can also be formed from a dilute solution of the copolymers. The hydrogel is formed with nanoparticles embedded therein to form a nanocomposite whose refractive index and modulus can be controlled by varying the amounts of nanoparticles and the polymer concentration of the hydrogel, respectively.
    Type: Application
    Filed: February 2, 2011
    Publication date: June 16, 2011
    Inventor: Nathan Ravi
  • Publication number: 20100113535
    Abstract: Compositions and methods for inhibiting the growth of lens epithelial cells are provided. The compositions provided include a chelating agent in an amount sufficient for inhibiting the growth of lens epithelial cells. The compositions and methods provided may also be used for the treatment of disorders of the eye, especially in the treatment of presbyopia.
    Type: Application
    Filed: October 28, 2009
    Publication date: May 6, 2010
    Applicants: The Department of Veterans Affairs Technology Transfer Program Office of Research and Developmen, Washington University School of Medicine Department of Ophtalmology & Visual Sciences
    Inventors: Nathan RAVI, Paul D. Hamilton
  • Patent number: 7670794
    Abstract: Methods for monitoring and managing glycemia status in a diabetic patient are disclosed. The methods comprise measuring in a diabetic patient, serum concentrations of HbA1c, glucose and inorganic phosphate and comparing the measured concentrations with reference concentrations. An equation representing the reference relationship of HbA1c, glucose and inorganic phosphate is also provided.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: March 2, 2010
    Assignee: Washington University
    Inventor: Nathan Ravi
  • Publication number: 20070269488
    Abstract: The present invention relates to reversible hydrogel systems. Particularly, the hydrogel of the present invention is made up of copolymers that can be a hydrogel when in an oxidized state and can be a solution when in a reduced state. A solution of the copolymer can be oxidized to form a hydrogel; and the hydrogel can be reduced to form a solution of the copolymer. Reversible nanogels can also be formed from a dilute solution of the copolymers.
    Type: Application
    Filed: September 3, 2004
    Publication date: November 22, 2007
    Inventor: Nathan Ravi
  • Publication number: 20070178062
    Abstract: Compositions and methods for inhibiting the growth of lens epithelial cells are provided. The compositions provided include a chelating agent in an amount sufficient for inhibiting the growth of lens epithelial cells. The compositions and methods provided may also be used for the treatment of disorders of the eye, especially in the treatment of presbyopia.
    Type: Application
    Filed: October 10, 2006
    Publication date: August 2, 2007
    Inventors: Nathan Ravi, Paul Hamilton
  • Publication number: 20070110707
    Abstract: Methods for preventing or diminishing non-enzymatic glycation as well as methods for treating diseases involving non-enzymatic glycation are disclosed. The methods involve administering to a patient an agent that decreases serum inorganic phosphate levels. The agent can be a carbonic anhydrase inhibitor diuretic agent or an agent that binds phosphate in the gastrointestinal tract.
    Type: Application
    Filed: November 1, 2006
    Publication date: May 17, 2007
    Applicant: Washington University
    Inventor: Nathan Ravi
  • Publication number: 20070111272
    Abstract: Methods for monitoring and managing glycemia status in a diabetic patient are disclosed. The methods comprise measuring in a diabetic patient, serum concentrations of HbA1c, glucose and inorganic phosphate and comparing the measured concentrations with reference concentrations. An equation representing the reference relationship of HbA1c, glucose and inorganic phosphate is also provided.
    Type: Application
    Filed: November 1, 2006
    Publication date: May 17, 2007
    Applicant: Washington University
    Inventor: Nathan Ravi
  • Publication number: 20040156880
    Abstract: The present invention relates to reversible hydrogel systems for medical applications. Particularly, the hydrogel of the present invention is made up of copolymers that can be a hydrogel when in an oxidized state and can be a solution when in a reduced state. A solution of the copolymer can be oxidized to form a hydrogel; and the hydrogel can be reduced to form a solution of the copolymer. The solution can be dehydrated to produce the dry copolymer for storage. Furthermore, the present invention also relates to methods of making and using the reversible hydrogel systems.
    Type: Application
    Filed: November 13, 2003
    Publication date: August 12, 2004
    Inventor: Nathan Ravi