Patents by Inventor Anthony L. Fitzhugh

Anthony L. Fitzhugh 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: 7226586
    Abstract: Extremely hydrophobic nitric oxide (NO) releasing polymers are disclosed. The extremely hydrophobic NO-releasing polymers provided are extensively cross-linked polyamine-derivatized divinylbenzene diazeniumdiolates. These polymers can be loaded with extremely high NO levels and designed to release NO in manners than mimic natural biological systems. The NO-releasing extremely hydrophobic polymers provided can maintain a sustained NO release for periods exceeding nine months. Also provided are related medical devices made using these NO-releasing extremely hydrophobic polymers.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: June 5, 2007
    Assignee: Medtronic Vascular, Inc.
    Inventors: Anthony L. Fitzhugh, Robert Cafferata, Larry K. Keefer
  • Patent number: 6887485
    Abstract: Biocompatible metallic medical devices having silanized surfaces coupled to nucleophile residues that release sustained, therapeutic amounts of nitric oxide to specific sites within a mammalian body are provided. Additionally, the biocompatible metallic medical devices can also be provided with anti-thrombogenic, lubricious coatings that release sustained, therapeutic amounts of nitric oxide. Moreover, the silanized metallic devices are surprisingly durable when exposed to harsh chemical methods often needed to bind nitric oxide-releasing functional groups to nucleophile residues. Furthermore, methods are provided for producing stable, silanized, sustained nitric oxide-releasing metallic medical devices.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: May 3, 2005
    Assignees: Medtronic Vascular, Inc., The United States of America as represented by the Department of Health and Human Services
    Inventors: Anthony L. Fitzhugh, Peiwen Cheng, Joseph Saavedra, Robert Cafferata, Marc Hendriks, Larry K. Keefer, Eugene Tedeschi, Michel I. P. M. Verhoeven
  • Patent number: 6703046
    Abstract: Extremely hydrophobic nitric oxide (NO) releasing polymers are disclosed. The extremely hydrophobic NO-releasing polymers provided are extensively cross-linked polyamine-derivatized divinylbenzene diazeniumdiolates. These polymers can be loaded with extremely high NO levels and designed to release NO in manners than mimic natural biological systems. The NO-releasing extremely hydrophobic polymers provided can maintain a sustained NO release for periods exceeding nine months. Also provided are related medical devices made using these NO-releasing extremely hydrophobic polymers.
    Type: Grant
    Filed: October 4, 2001
    Date of Patent: March 9, 2004
    Assignees: Medtronic AVE Inc., United States of America
    Inventors: Anthony L. Fitzhugh, Robert Cafferata, Larry K. Keefer
  • Publication number: 20030077243
    Abstract: Extremely hydrophobic nitric oxide (NO) releasing polymers are disclosed. The extremely hydrophobic NO-releasing polymers provided are extensively cross-linked polyamine-derivatized divinylbenzene diazeniumdiolates. These polymers can be loaded with extremely high NO levels and designed to release NO in manners than mimic natural biological systems. The NO-releasing extremely hydrophobic polymers provided can maintain a sustained NO release for periods exceeding nine months. Also provided are related medical devices made using these NO-releasing extremely hydrophobic polymers.
    Type: Application
    Filed: October 4, 2001
    Publication date: April 24, 2003
    Inventors: Anthony L. Fitzhugh, Robert Cafferata, Larry K. Keefer
  • Publication number: 20010041184
    Abstract: Biocompatible metallic medical devices having silanized surfaces coupled to nucleophile residues that release sustained, therapeutic amounts of nitric oxide to specific sites within a mammalian body are provided. Additionally, the biocompatible metallic medical devices can also be provided with anti-thrombogenic, lubricious coatings that release sustained, therapeutic amounts of nitric oxide. Moreover, the silanized metallic devices are surprisingly durable when exposed to harsh chemical methods often needed to bind nitric oxide-releasing functional groups to nucleophile residues. Furthermore, methods are provided for producing stable, silanized, sustained nitric oxide-releasing metallic medical devices.
    Type: Application
    Filed: May 25, 2001
    Publication date: November 15, 2001
    Inventors: Anthony L. Fitzhugh, Peiwen Cheng, Joseph Saavedra, Robert Cafferata, Marc Hendriks, Larry K. Keefer, Eugene Tedeschi, Michel I.P.M. Verhoeven
  • Patent number: 6270779
    Abstract: Biocompatible metallic medical devices having silanized surfaces coupled to nucleophile residues that release sustained, therapeutic amounts of nitric oxide to specific sites within a mammalian body are provided. Additionally, the biocompatible metallic medical devices can also be provided with anti-thrombogenic, lubricious coatings that release sustained, therapeutic amounts of nitric oxide. Moreover, the silanized metallic devices are surprisingly durable when exposed to harsh chemical methods often needed to bind nitric oxide-releasing functional groups to nucleophile residues. Furthermore, methods are provided for producing stable, silanized, sustained nitric oxide-releasing metallic medical devices.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: August 7, 2001
    Assignee: United States of America
    Inventors: Anthony L. Fitzhugh, Peiwen Cheng, Joseph Saavedra, Robert Cafferata, Marc Hendriks, Larry K. Keefer, Eugene Tedeschi, Michel L. P. M. Verhoeven
  • Patent number: 5698693
    Abstract: A method for resolving 5,6,7,8-tetrahydrofolic acid derivatives into diastereomerically pure 6R and 6S forms. The method comprises (1) alpha esterification of the tetrahydrofolic acid derivative; (2) resolution of the alpha monoester into pure diastereomer; and (3) deprotecting the resolved alpha monoester to thereby produce the pure diastereomer of the original 5,6,7,8 tetrahydrofolic acid derivative. The resolution step can be carried out by any conventional means including chromatography or fractional crystallization. The method results in absolute diastereomeric purity even when an achiral stationary phase is used for the resolution.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: December 16, 1997
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Anthony L. Fitzhugh, Rhone K. Akee
  • Patent number: 5153309
    Abstract: The invention is a method of synthesizing tetrahydropteroylpoly-L-glutamic acid derivatives starting from the mono-L-glutamic acid derivatives. The method has the advantage of not requiring any enzymes.
    Type: Grant
    Filed: July 27, 1990
    Date of Patent: October 6, 1992
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventor: Anthony L. Fitzhugh