Patents by Inventor Mingfei Chen

Mingfei Chen 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).

  • Publication number: 20100247597
    Abstract: The present disclosure generally relates to biocompatible polymers for coating or fabricating implantable medical devices and to implantable medical devices having the present biocompatible polymers. The disclosed biocompatible polymers exhibit superior biocompatibility and therefore minimize unwanted immune reaction from a patient into whom a medical device is implanted.
    Type: Application
    Filed: March 31, 2009
    Publication date: September 30, 2010
    Applicant: Medtroni Vascular, Inc.
    Inventors: Mingfei Chen, Peiwen Cheng, Kishore Udipi
  • Publication number: 20100198338
    Abstract: Described herein are hydrogen sulfide (H2S) donating polymers and polymer systems suitable for coating or forming medical devices and methods for making and using the same. More specifically, described are H2S donating polymers comprising at least one monomer with at least one basic group that can be complexed with H2S to form a charged H2S complex. The H2S donating polymers can provide controlled release of H2S once implanted at or within the target surgical site. The H2S donating polymers can be coated onto a medical device, formed into a medical device or combined with one or more other polymers to form a polymer system.
    Type: Application
    Filed: January 30, 2009
    Publication date: August 5, 2010
    Applicant: Medtronic Vascular, Inc., A Delaware Corporation
    Inventors: Mingfei Chen, Christopher Storment
  • Publication number: 20100159119
    Abstract: The methods of the present disclosure in a broad aspect provide for dry diazeniumdiolation procedures for producing nitric oxide releasing medical devices. These medical devices may alternatively have cap coats applied prior to dry diazeniumdiolation to produce nitric oxide releasing medical devices with cap coats.
    Type: Application
    Filed: December 19, 2008
    Publication date: June 24, 2010
    Applicant: Medtronic Vascular, Inc.
    Inventors: Mingfei Chen, Peiwen Cheng, Kishore Udipi
  • Publication number: 20090232868
    Abstract: Disclosed herein are biocompatible carbon-based nitric oxide (NO) donating polymers suitable for forming and coating medical devices. These polymers have acrylate backbones and are comprised of substantially hydrophobic monomers. The NO donating polymers are carbon based wherein the diazeniumdiolate group is attached to the acetate group on an acetate based monomer. Incorporating a vinyl acetate monomer into an acrylate based polymer allows diazeniumdiolation of a polymer that would otherwise not accommodate the diazeniumdiolate group.
    Type: Application
    Filed: March 17, 2008
    Publication date: September 17, 2009
    Applicant: Medtronic Vascular, Inc.
    Inventors: Mingfei Chen, Peiwen Cheng
  • Publication number: 20090232863
    Abstract: Disclosed herein are implantable medical devices coated with or comprising bioabsorbable carbon-based nitric oxide-donating polymers that upon exposure to physiological environments donate nitric oxide (NO).
    Type: Application
    Filed: March 17, 2008
    Publication date: September 17, 2009
    Applicant: Medtronic Vascular, Inc.
    Inventors: Peiwen Cheng, Kishore Udipi, Mingfei Chen
  • Publication number: 20090222088
    Abstract: Disclosed herein are polymers used to coat or form implantable medical devices. The polymers comprise secondary amines useful in binding nitric oxide (NO). After diazeniumdiolation, the polymers can sustain controlled release of NO. In one embodiment, the secondary amines are linked to a functionalized dendrimer. In another embodiment, secondary amines are chelated with copper (II) which in turn serve as a catalyst for NO production.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 3, 2009
    Applicant: Medtronic Vascular, Inc.
    Inventors: Mingfei Chen, Peiwen Cheng
  • Publication number: 20090043378
    Abstract: A self-orienting biocompatible polymer system incorporating a hydrophilic surface and a hydrophobic core are disclosed. The hydrophilic surface aids in biocompatibility while the hydrophobic core allows the polymer system to accommodate a hydrophobic drug. Medical devices coated with the polymer system are also disclosed.
    Type: Application
    Filed: September 26, 2007
    Publication date: February 12, 2009
    Applicant: Medtronic Vascular, Inc.
    Inventors: Peiwen Cheng, Mingfei Chen, Kishore Udipi
  • Publication number: 20090028966
    Abstract: Biocompatible polymers having polymer backbones with at least one secondary amine suitable for diazeniumdiolation are disclosed. Specifically, methods for providing secondary amines-containing polymers using epoxide-opening reactions are provided. More specifically, nitric oxide-releasing medical devices made using these polymers are disclosed.
    Type: Application
    Filed: July 24, 2007
    Publication date: January 29, 2009
    Applicant: Medtronic Vascular, Inc.
    Inventors: Mingfei Chen, Peiwen Cheng, Kishore Udipi
  • Publication number: 20090022769
    Abstract: Disclosed are drug delivery systems comprising drugs admixed with polymers having drug solubility gradients and methods of making the polymers. Also disclosed are medical devices having coatings thereon comprising the drug solubility gradient-containing polymers and at least one drug.
    Type: Application
    Filed: July 20, 2007
    Publication date: January 22, 2009
    Applicant: Medtronic Vascular, Inc.
    Inventors: Mingfei Chen, Peiwen Cheng, Kishore Udipi
  • Publication number: 20080305143
    Abstract: Controlled radical polymerization-derived biocompatible block copolymer coatings for medical devices are disclosed. Specifically, block copolymer coatings designed to control the release of bioactive agents from medical devices in vivo are disclosed. The present application also discloses providing vascular stents with drug-eluting controlled release block copolymer coatings and related methods for making these medical devices and coatings.
    Type: Application
    Filed: August 9, 2006
    Publication date: December 11, 2008
    Applicant: Medtronic Vascular, Inc.
    Inventors: Mingfei Chen, Peiwen Cheng, Kishore Udipi
  • Patent number: 7442721
    Abstract: Disclosed herein are biocompatible durable controlled drug releasing polymeric coatings for medical devices. The drug release rates of the polymers are controlled by adjusting monomer ratios and glass transition temperatures Tgs. The polymers are durable; they do not delaminate from the coated medical device.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: October 28, 2008
    Assignee: Medtronic Vascular, Inc.
    Inventors: Peiwen Cheng, Mingfei Chen, Kishore Udipi
  • Publication number: 20080254085
    Abstract: Disclosed herein are implantable medical devices having controlled release biodegradable polymer coatings thereon wherein the polymer is formed from ring opening of ?-butyrolactone and at least one additional monomer selected from the group consisting of trimethylene carbonate, lactide, polyethylene glycol, glycolide, the monomers formed from ring opening of ?-caprolactone, 4-tert-butyl caprolactone, and N-acetyl caprolactone, and combinations thereof, and at least one drug releasable from the biodegradable polymer. Also disclosed are implantable medical devices form of the biodegradable polymers and processes for forming the polymers.
    Type: Application
    Filed: April 13, 2007
    Publication date: October 16, 2008
    Applicant: Medtronic Vascular, Inc.
    Inventors: Mingfei Chen, Peiwen Cheng, Ya Guo, Kishore Udipi
  • Publication number: 20080233169
    Abstract: N-substituted 4-aza-caprolactone biodegradable polymers, including derivatives thereof, useful for making implantable medical devices and coatings therefore are provided. The medical devices and coatings of the present invention can also be used for in situ controlled release drug delivery and are useful for treating or preventing medical conditions such as restenosis, aneurisms and vulnerable plaque.
    Type: Application
    Filed: August 9, 2006
    Publication date: September 25, 2008
    Applicant: Medtronic Vasular, Inc.
    Inventors: Mingfei Chen, Peiwen Cheng, Kishore Udipi
  • Publication number: 20080233168
    Abstract: Biodegradable polymers useful for fabricating implantable medical devices and as coatings for medical devices are provided. The biodegradable polymers are biocompatible and can be tuned to provide optimum bioactive agent elution rates as well as degradation rates. Also provided are methods for making medical devices and medical device coatings using the biodegradable polymers.
    Type: Application
    Filed: August 9, 2006
    Publication date: September 25, 2008
    Applicant: Medtronic Vascular, Inc.
    Inventors: Peiwen Cheng, Mingfei Chen, Kishore Udipi
  • Publication number: 20080220040
    Abstract: Disclosed are implantable medical devices comprising nitric oxide (NO) donating polymers comprising polymer backbones having at least one cyclic amine disposed thereon. Methods are further disclosed for providing nitric oxide-donating polymers.
    Type: Application
    Filed: March 8, 2007
    Publication date: September 11, 2008
    Applicant: Medtronic Vascular, Inc.
    Inventors: Peiwen Cheng, Mingfei Chen, Kishore Udipi
  • Publication number: 20080220048
    Abstract: Nitric Oxide (NO)-releasing polymers useful as implantable medical devices and coatings therefore are provided. Specifically the implantable medical devices and/or coatings comprise NO-releasing biodegradable polymers derived from [1,4]oxazepan-7-one and its derivatives. The medical devices and coatings of the present invention can also be used for in situ controlled release delivery of additional bioactive agents and are useful for treating or preventing medical conditions such as restenosis, aneurysms and vulnerable plaque.
    Type: Application
    Filed: August 9, 2006
    Publication date: September 11, 2008
    Applicant: Medtronic Vascular, Inc.
    Inventors: Mingfei Chen, Kishore Udipi, Peiwen Cheng
  • Publication number: 20080220046
    Abstract: Disclosed herein are implantable medical devices comprising controlled release terpolymers and at least one drug releasable from said terpolymers coating. The terpolymers of the present invention are comprised of acrylate and/or vinyl monomers.
    Type: Application
    Filed: March 8, 2007
    Publication date: September 11, 2008
    Applicant: Medtronic Vascular, Inc.
    Inventors: Peiwen Cheng, Kishore Udipi, Mingfei Chen
  • Publication number: 20070264307
    Abstract: Disclosed herein are biodegradable modified caprolactone polymers for coating and forming medical devices. The properties of the polymers are fine tuned for optimal performance depending on the medical purpose. Moreover, the polymers are suitable for the controlled in situ release of drugs at the treatment site.
    Type: Application
    Filed: May 15, 2006
    Publication date: November 15, 2007
    Applicant: Medtronic Vascular, Inc.
    Inventors: Mingfei Chen, Peiwen Cheng, Ya Guo, Kishore Udipi
  • Publication number: 20070264225
    Abstract: Disclosed are hindered amine nitric oxide (NO) donating polymers for coating implantable medical devices. The polymers include sterically hindered secondary amines that do not react with monomer carbonyls or electrophilic alkenes, facilitating the synthesis of the NO donating polymers. The polymers are coated on implantable medical devices, providing anti-restenosis therapy by the release of NO at the implantation site.
    Type: Application
    Filed: May 15, 2006
    Publication date: November 15, 2007
    Applicant: Medtronic Vascular, Inc.
    Inventors: Peiwen Cheng, Mingfei Chen, Kishore Udipi
  • Publication number: 20070244284
    Abstract: Disclosed herein are biocompatible durable controlled drug releasing polymeric coatings for medical devices. The drug release rates of the polymers are controlled by adjusting monomer ratios and glass transition temperatures Tgs. The polymers are durable; they do not delaminate from the coated medical device.
    Type: Application
    Filed: April 14, 2006
    Publication date: October 18, 2007
    Applicant: Medtronic Vascular, Inc.
    Inventors: Peiwen Cheng, Mingfei Chen, Kishore Udipi