Patents by Inventor Ronald F. Ofstead

Ronald F. Ofstead 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: 8202833
    Abstract: The present invention provides method and materials for forming a polymeric matrix having improved biocompatible properties. A polymerization accelerator is provided that includes an N-vinyl group and a biocompatible functional group. The polymerization accelerator is particularly useful for the polymerization of macromers, which can be used to form biocompatible polymeric coatings on the surface of biological materials, such as cells and tissue.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: June 19, 2012
    Assignee: Surmodics, Inc.
    Inventors: Dale G. Swan, Stephen J. Chudzik, Ronald F. Ofstead
  • Patent number: 8143043
    Abstract: Positively-charged initiator polymers having a polymerization initiator group and a cationic portion are provided. The initiator polymers can be used with a polymerizable material for the formation of a polymeric matrix on a surface. The initiator polymers are particularly useful for cell encapsulation using macromers.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: March 27, 2012
    Assignee: Surmodics, Inc.
    Inventors: Stephen J. Chudzik, Ronald F. Ofstead, Dale G. Swan
  • Patent number: 8129159
    Abstract: The present invention relates to methods, reagents, and substrates that can be used for, for example, immobilizing biomolecules, such as nucleic acids and proteins. In an embodiment, the present invention relates to surfaces coated with a polymer according to the present invention. In an embodiment, the present invention relates to methods for thermochemically and/or photochemically attaching molecules to a surface at a high density.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: March 6, 2012
    Assignee: Surmodics, Inc.
    Inventors: Ronald F. Ofstead, Melvin J. Swanson, Dale G. Swan
  • Publication number: 20110054417
    Abstract: A coating composition in the form of a one or multi-part system, and method of applying such a composition under conditions of controlled humidity, for use in coating device surfaces to control and/or improve their ability to release bioactive agents in aqueous systems. The coating composition is particularly adapted for use with medical devices that undergo significant flexion and/or expansion in the course of their delivery and/or use, such as stents and catheters. The composition includes the bioactive agent in combination with a first polymer component such as polyalkyl(meth)acrylate, polyaryl(meth)acrylate, polyaralkyl(meth)acrylate, or polyaryloxyalkyl(meth)acrylate and a second polymer component such as poly(ethylene-co-vinyl acetate).
    Type: Application
    Filed: November 8, 2010
    Publication date: March 3, 2011
    Applicant: SurModics, Inc.
    Inventors: Ralph A. Chappa, Robert W. Hergenrother, Aron B. Anderson, Linh V. Tran, Laurie R. Lawin, Ronald F. Ofstead
  • Publication number: 20110009292
    Abstract: The present invention relates to methods, reagents, and substrates that can be used for, for example, immobilizing biomolecules, such as nucleic acids and proteins. In an embodiment, the present invention relates to surfaces coated with a polymer according to the present invention. In an embodiment, the present invention relates to methods for thermochemically and/or photochemically attaching molecules to a surface at a high density.
    Type: Application
    Filed: September 9, 2010
    Publication date: January 13, 2011
    Applicant: SurModics, Inc.
    Inventors: Ronald F. Ofstead, Melvin J. Swanson, Dale G. Swan
  • Patent number: 7833548
    Abstract: A coating composition in the form of a one or multi-part system, and method of applying such a composition under conditions of controlled humidity, for use in coating device surfaces to control and/or improve their ability to release bioactive agents in aqueous systems. The coating composition is particularly adapted for use with medical devices that undergo significant flexion and/or expansion in the course of their delivery and/or use, such as stents and catheters. The composition includes the bioactive agent in combination with a first polymer component such as polyalkyl(meth)acrylate, polyaryl(meth)acrylate, polyaralkyl(meth)acrylate, or polyaryloxyalkyl(meth)acrylate and a second polymer component such as poly(ethylene-co-vinyl acetate).
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: November 16, 2010
    Assignee: Surmodics, Inc.
    Inventors: Ralph A. Chappa, Robert W. Hergenrother, Aron B. Anderson, Linh V. Tran, Laurie R. Lawin, Ronald F. Ofstead
  • Patent number: 7829317
    Abstract: The present invention relates to methods, reagents, and substrates that can be used for, for example, immobilizing biomolecules, such as nucleic acids and proteins. In an embodiment, the present invention relates to surfaces coated with a polymer according to the present invention. In an embodiment, the present invention relates to methods for thermochemically and/or photochemically attaching molecules to a surface at a high density.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: November 9, 2010
    Assignee: SurModics, Inc.
    Inventors: Ronald F. Ofstead, Melvin J. Swanson, Dale G. Swan
  • Publication number: 20100158799
    Abstract: A composition for bioactive agent release in vivo. The composition includes the bioactive agent in combination with a mixture of a first polymer component such as poly(butyl methacrylate) and a second polymer component such as poly(ethylene-co-vinyl acetate).
    Type: Application
    Filed: March 3, 2010
    Publication date: June 24, 2010
    Applicant: SurModics, Inc.
    Inventors: Stephen J. Chudzik, Timothy M. Kloke, Laurie R. Lawin, Ronald F. Ofstead, Ralph A. Chappa, Robert W. Hergenrother, Aron B. Anderson, Linh V. Tran
  • Publication number: 20090317887
    Abstract: Positively-charged initiator polymers having a polymerization initiator group and a cationic portion are provided. The initiator polymers can be used with a polymerizable material for the formation of a polymeric matrix on a surface. The initiator polymers are particularly useful for cell encapsulation using macromers.
    Type: Application
    Filed: April 2, 2009
    Publication date: December 24, 2009
    Inventors: Stephen J. Chudzik, Ronald F. Ofstead, Dale G. Swan
  • Patent number: 7585499
    Abstract: Positively-charged initiator polymers having a polymerization initiator group and a cationic portion are provided. The initiator polymers can be used with a polymerizable material for the formation of a polymeric matrix on a surface. The initiator polymers are particularly useful for cell encapsulation using macromers.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: September 8, 2009
    Assignee: SurModics, Inc.
    Inventors: Stephen J. Chudzik, Ronald F. Ofstead, Dale G. Swan
  • Publication number: 20090042742
    Abstract: The present invention relates to methods, reagents, and substrates that can be used for, for example, immobilizing biomolecules, such as nucleic acids and proteins. In an embodiment, the present invention relates to surfaces coated with a polymer according to the present invention. In an embodiment, the present invention relates to methods for thermochemically and/or photochemically attaching molecules to a surface at a high density.
    Type: Application
    Filed: September 14, 2007
    Publication date: February 12, 2009
    Applicant: SurModics, Inc.
    Inventors: Ronald F. Ofstead, Melvin J. Swanson, Dale G. Swan
  • Patent number: 7309593
    Abstract: The present invention relates to methods, reagents, and substrates that can be used for, for example, immobilizing biomolecules, such as nucleic acids and proteins. In an embodiment, the present invention relates to surfaces coated with a polymer according to the present invention. In an embodiment, the present invention relates to methods for thermochemically and/or photochemically attaching molecules to a surface at a high density.
    Type: Grant
    Filed: October 1, 2003
    Date of Patent: December 18, 2007
    Assignee: SurModics, Inc.
    Inventors: Ronald F. Ofstead, Melvin J. Swanson, Dale G. Swan
  • Publication number: 20070248637
    Abstract: A coating composition in the form of a one or multi-part system, and method of applying such a composition under conditions of controlled humidity, for use in coating device surfaces to control and/or improve their ability to release bioactive agents in aqueous systems. The coating composition is particularly adapted for use with medical devices that undergo significant flexion and/or expansion in the course of their delivery and/or use, such as stents and catheters. The composition includes the bioactive agent in combination with a first polymer component such as polyalkyl(meth)acrylate, polyaryl(meth)acrylate, polyaralkyl(meth)acrylate, or polyaryloxyalkyl(meth)acrylate and a second polymer component such as poly(ethylene-co-vinyl acetate).
    Type: Application
    Filed: August 19, 2005
    Publication date: October 25, 2007
    Inventors: Ralph A. Chappa, Robert W. Hergenrother, Aron B. Anderson, Linh V. Tran, Laurie R. Lawin, Ronald F. Ofstead
  • Patent number: 7097850
    Abstract: A coating composition in the form of a one or multi-part system, and method of applying such a composition under conditions of controlled humidity, for use in coating device surfaces to control and/or improve their ability to release bioactive agents in aqueous systems. The coating composition is particularly adapted for use with medical devices that undergo significant flexion and/or expansion in the course of their delivery and/or use, such as stents and catheters. The composition includes the bioactive agent in combination with a first polymer component such as polyalkyl(meth)acrylate, polyaryl(meth)acrylate, polyaralkyl(meth)acrylate, or polyaryloxyalkyl(meth)acrylate and a second polymer component such as poly(ethylene-co-vinyl acetate).
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: August 29, 2006
    Assignee: SurModics, Inc.
    Inventors: Ralph A. Chappa, Robert W. Hergenrother, Aron B. Anderson, Linh V. Tran, Laurie R. Lawin, Ronald F. Ofstead
  • Publication number: 20040202774
    Abstract: Positively-charged initiator polymers having a polymerization initiator group and a cationic portion are provided. The initiator polymers can be used with a polymerizable material for the formation of a polymeric matrix on a surface. The initiator polymers are particularly useful for cell encapsulation using macromers.
    Type: Application
    Filed: April 10, 2003
    Publication date: October 14, 2004
    Applicant: SurModics, Inc.
    Inventors: Stephen J. Chudzik, Ronald F. Ofstead, Dale G. Swan
  • Publication number: 20030232122
    Abstract: A coating composition in the form of a one or multi-part system, and method of applying such a composition under conditions of controlled humidity, for use in coating device surfaces to control and/or improve their ability to release bioactive agents in aqueous systems. The coating composition is particularly adapted for use with medical devices that undergo significant flexion and/or expansion in the course of their delivery and/or use, such as stents and catheters. The composition includes the bioactive agent in combination with a first polymer component such as polyalkyl(meth)acrylate, polyaryl(meth)acrylate, polyaralkyl(meth)acrylate, or polyaryloxyalkyl(meth)acrylate and a second polymer component such as poly(ethylene-co-vinyl acetate).
    Type: Application
    Filed: June 18, 2002
    Publication date: December 18, 2003
    Inventors: Ralph A. Chappa, Robert W. Hergenrother, Aron B. Anderson, Linh V. Tran, Laurie R. Lawin, Ronald F. Ofstead
  • Publication number: 20030232087
    Abstract: A coating composition, and method of applying such a composition under conditions of controlled humidity, for use in coating device surfaces to control and/or improve their ability to release bioactive agents in aqueous systems. The coating composition is particularly adapted for use with medical devices that undergo significant flexion and/or expansion in the course of their delivery and/or use, such as stents and catheters. The composition includes the bioactive agent in combination with a combination of a first polymer component such as polyaryl(meth)acrylate, polyaralkyl(meth)acrylate, or polyaryloxyalkyl(meth)acrylate and a second polymer component such as poly(ethylene-co-vinyl acetate).
    Type: Application
    Filed: June 18, 2002
    Publication date: December 18, 2003
    Inventors: Laurie R. Lawin, Ronald F. Ofstead, Ralph A. Chappa, Robert W. Hergenrother, Aron B. Anderson, Linh V. Tran
  • Publication number: 20020188037
    Abstract: A coating composition, and method of applying such a composition under conditions of controlled humidity, for use in coating device surfaces to control and/or improve their ability to release bioactive agents in aqueous systems. The coating composition is particularly adapted for use with medical devices that undergo significant flexion and/or expansion in the course of their delivery and/or use, such as stents and catheters. The composition includes the bioactive agent in combination with a combination of a first polymer component such as polyalyl(meth)acrylate, polyaryl(meth)acrylate, polyaralkyl(meth)acrylate, or polyaryloxyalkyl(meth)acrylate and a second polymer component such as poly(ethylene-co-vinyl acetate).
    Type: Application
    Filed: June 18, 2002
    Publication date: December 12, 2002
    Inventors: Stephen J. Chudzik, Timothy M. Kloke, Laurie R. Lawin, Ronald F. Ofstead, Ralph A. Chappa, Robert W. Hergenrother, Aron B. Anderson, Linh V. Tran
  • Patent number: 5188688
    Abstract: A gelatin capsule sealant of a water soluble, amide-containing polymer adhesive in a volatile, essentially non-aqueous solvent is used to seal gelatin capsule sections together at less than the entire circumference of overlap between the capsule sections. The sealant may also adhere a pharmaceutical caplet within the capsule to the internal wall of the capsule. The method of applying the sealant to the capsule sections and possibly also the pharmaceutical caplet uses a drop of the sealant spread at the junction of an eccentric arcuate portion of the sections and the pharmaceutical caplet. The solvent evaporates from the sealant through the portion of the capsule section overlap not sealed. The sealant may use "generally regarded as safe" (GRAS) solvents and may also include a GRAS dye for visual indication tha that the capsule is eccentrically sealed to resist manually forced separation of the capsule sections.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: February 23, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James R. Boardman, Ronald F. Ofstead
  • Patent number: 4977901
    Abstract: A non-crosslinked crystallized polymer or polymer blending coating is disclosed for articles that come into contact with bodily fluids. The polymer or polymer blend to be used is crystallizable and is stable in the presence of water at temperatures of up to about 60.degree. C. when in the crystalline state. The polymer or polymer blend is dissolved in a solvent, such as water or dimethyl sulfoxide (DMSO), and is coated on the article. The polymer coating is then crystallized, generally by heat treatment, providing both toughness and increased adherence of the coating to the article without ready dissolution when the article comes into contact with fluids.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: December 18, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald F. Ofstead