Search Patents
  • Method and an apparatus for forming a one-piece introducer
    Publication number: 20050054984
    Abstract: A method and an apparatus for forming a one-piece introducer in which at least one finger tab is formed at one end of a tube.
    Type: Application
    Filed: October 19, 2004
    Publication date: March 10, 2005
    Applicant: Medex, Inc.
    Inventors: William Polley, Fidelis Onwumere
  • Adjustable Gastric Band Having Anti-Microbial Coatings
    Publication number: 20080146869
    Abstract: An implantable surgical device including an elongated flexible inflatable portion, an elongated flexible and substantially inextensible band portion. The band portion has a distal end, a proximal end and a longitudinal axis therebetween. The band portion is attached to the inflatable portion along an inner face thereof. The band portion and/or the inflatable portion is at least partially coated with an anti-microbial coating.
    Type: Application
    Filed: October 30, 2006
    Publication date: June 19, 2008
    Inventors: Hector Chow, Fidelis Onwumere
  • Apparatus and method for marking tissue
    Publication number: 20050234336
    Abstract: The present invention includes methods and materials for implantable devices (markers) which are disclosed for permanently marking the location of a biopsy or surgery for the purpose of identification. The devices are remotely delivered, preferably percutaneously. Visualization of the markers is readily accomplished using various state of the art imaging systems. Preferred visualization is through MRI, X-ray and ultrasound. The markers function to provide evidence of the location of the lesion after the procedure is complete for reference during future examinations or procedures.
    Type: Application
    Filed: March 26, 2004
    Publication date: October 20, 2005
    Inventors: Andrew Beckman, Fidelis Onwumere, Michael Ludzack, Charles Samples, Ana Barbur
  • METHODS AND DEVICES FOR MEASURING TOTAL POLAR COMPOUNDS IN DEGRADING OILS
    Publication number: 20070048871
    Abstract: This invention relates to methods for determining whether or not to discard a sample of oil based on the presence of polar compounds in the oil and devices to be used therewith. In a preferred embodiment a test strip comprising an adsorbent affixed to a backing is spotted with a polar indicator. A sample of oil is positioned on a heat conducting device supporting the test strip and the oil is allowed to migrate over the adsorbent material thereby displacing the polar indicator in an amount related to the amount of polar compounds in the oil. This displacement is correlated to the amount of polar compounds in the sample.
    Type: Application
    Filed: October 27, 2006
    Publication date: March 1, 2007
    Inventors: Fidelis Onwumere, Robert Pranis, Jack Truong
  • Intravenous catheter assembly and a method of making a combination hub and catheter
    Publication number: 20010009988
    Abstract: According to one aspect of the invention a method is provided for making a combination hub and catheter. A material is molded into a body having at least a first hub, and at least a first nose extending from the first hub. The first nose is then elongated into a catheter.
    Type: Application
    Filed: February 8, 2001
    Publication date: July 26, 2001
    Inventors: Adel Kafrawy, Fidelis C. Onwumere
  • Method and an apparatus for forming a one-piece introducer
    Patent number: 6837873
    Abstract: A method and an apparatus for forming a one-piece introducer in which at least one finger tab is formed at one end of a tube. The apparatus is formed from a molton polymer fed into the cavity of a mold. The cavity of the mold has a portion that forms a tube and a portion that forms a tab.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: January 4, 2005
    Assignee: Medex, Inc.
    Inventors: William F. Polley, Fidelis C. Onwumere
  • Enhanced radiopacity of peripheral and central catheter tubing
    Patent number: 6200338
    Abstract: A medical implant, tubing and method to provide enhanced X-ray detection intensity in catheters, stents, vascular grafts or other tubular implants. In one aspect the medical implant includes a visually transparent radiopaque polymer and a filler material having a radiopaque component.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: March 13, 2001
    Assignee: Ethicon, Inc.
    Inventors: Donald D. Solomon, Fidelis C. Onwumere
  • Melt processable polyurethaneurea copolymers and method for their preparation
    Patent number: 5250649
    Abstract: Melt processable polyurethaneureas are prepared from a diisocyanate, a polyglycol, a diol chain extender and an amine terminated polyether. Water may be included as a reactant, and the polymer may contain an additive such as a radiopaque material and a coating of an antithrombogenic agent or an antimicrobial agent. The invention includes a one-pot bulk polymerization method for preparation of the polymers.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: October 5, 1993
    Assignee: Becton, Dickinson and Company
    Inventors: Fidelis C. Onwumere, Donald D. Solomon
  • Polyurethane and medical article therefrom
    Patent number: 5159050
    Abstract: A thermoplastic polyurethane has tertiary amino groups in the polymer chain. Protonation of the amino groups with an aqueous acid causes the polymer to absorb up to 1,000% by weight of water and swell. The protonated amino groups form a complex with an antithrombogenic agent to give an antithrombogenic polyurethane. The invention includes a shaped article of the polyurethane. The shaped article may be antithrombogenic.
    Type: Grant
    Filed: May 9, 1991
    Date of Patent: October 27, 1992
    Assignee: Becton, Dickinson and Company
    Inventor: Fidelis C. Onwumere
  • Biostable polyurethane
    Patent number: 5159051
    Abstract: A thermoplastic polyurethane having prolonged biostability has tertiary amino groups in the polymer chain. Protonation of the amino groups with an aqueous acid causes the polymer to absorb up to 1,700% by weight of water and swell. The protonated amino groups form a complex with an antithrombogenic agent to give an antithrombogenic polyurethane. The invention includes a shaped article of the polyurethane.
    Type: Grant
    Filed: May 9, 1991
    Date of Patent: October 27, 1992
    Assignee: Becton, Dickinson and Company
    Inventors: Fidelis C. Onwumere, Nancy L. Shields
  • Method of making an intravenous catheter assembly
    Patent number: 6192568
    Abstract: A method is provided for making a combination hub and catheter. A material is molded in a mold into a body having at least a first hub, and at least a first nose extending from the first hub. The first nose is then elongated into a catheter by moving first and second components of the mold away from one another.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: February 27, 2001
    Assignee: Ethicon, Inc.
    Inventors: Adel Kafrawy, Fidelis C. Onwumere
  • Method for rendering a substrate surface antithrombogenic and/or anti-infective
    Patent number: 5328698
    Abstract: A shaped medical article of a polymeric substrate is extrusion coated with a composition which includes a bioactive agent dispersed in a matrix polymer. Preferred bioactive agents are temperature sensitive agents which undergo thermal decomposition at a temperature above the processing temperature of the matrix polymer. Preferred matrix polymers have a melting point of about 100.degree. C. or lower.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: July 12, 1994
    Assignee: Becton, Dickinson and Company
    Inventors: Fidelis C. Onwumere, Donald D. Solomon, Stanley C. Wells
  • Thermoplastic polyurethane blends
    Patent number: 5281677
    Abstract: A thermoplastic polyurethane chain extended with an alkylenediol is blended with a thermoplastic polyurethane chain extended with an oxyalkylene qlycol oligomer. The blend is extruded into a catheter tubing having sufficient initial stiffness for satisfactory insertion in a patient and a high degree of softening for safe positioning and long term catheterization procedures without the risk of vessel wall perforation.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: January 25, 1994
    Assignee: Becton, Dickinson and Company
    Inventors: Theo O. Onwunaka, Fidelis C. Onwumere, James M. Lambert
  • Radiopaque polymer coating
    Patent number: 6623823
    Abstract: An apparatus and method to produce radiopaque medical implants such as catheters, stents, or other implants. A composition of a radiopaque brominated polyurethane coat and a polyurethane tubing core is formed. In one embodiment, the polyurethane coat includes a diisocyanate and a brominated diol having a bromine concentration of 30% or more. The coat is applied to the elastomeric polyurethane tubing core surface. The medical implant takes advantage of employing a brominated radiopaque polyurethane with the tensile properties, for example of flexibility and kink resistance, of the elastomeric thermoplastic polyurethane tubing core without degrading these desirable characteristics.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: September 23, 2003
    Assignee: Ethicon, Inc.
    Inventor: Fidelis C. Onwumere
  • Methods and devices for measuring total polar compounds in degrading oils
    Publication number: 20030027346
    Abstract: This invention relates to methods for determining whether or not to discard a sample of oil based on the presence of polar compounds in the oil and devices to be used therewith. In a preferred embodiment a test strip comprising an adsorbent affixed to a backing is spotted with a polar indicator. A sample of oil is positioned on a heat conducting device supporting the test strip and the oil is allowed to migrate over the adsorbent material thereby displacing the polar indicator in an amount related to the amount of polar compounds in the oil. This displacement is correlated to the amount of polar compounds in the sample.
    Type: Application
    Filed: June 24, 2002
    Publication date: February 6, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Fidelis C. Onwumere, Robert A. Pranis, Jack G. Truong
  • Methods and devices for measuring total polar compounds in degrading oils
    Patent number: 7132079
    Abstract: This invention relates to methods for determining whether or not to discard a sample of oil based on the presence of polar compounds in the oil and devices to be used therewith. In a preferred embodiment a test strip comprising an adsorbent affixed to a backing is spotted with a polar indicator. A sample of oil is positioned on a heat conducting device supporting the test strip and the oil is allowed to migrate over the adsorbent material thereby displacing the polar indicator in an amount related to the amount of polar compounds in the oil. This displacement is correlated to the amount of polar compounds in the sample.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: November 7, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Fidelis C. Onwumere, Robert A. Pranis, Jack G. Truong
  • Thermally reversible polymers
    Patent number: 5491210
    Abstract: The invention provides a polymer adapted for use in melt processes, the polymer having a thermally reversible bond which is adapted to evanesce at an elevated temperature and revert to a thermally reversible bond upon cooling to ambient temperature so that the polymer is adapted, upon being heated to the elevated temperature, to dissociate into melt processable polymeric fragments and, upon being cooled to ambient temperature, to re-associate. The thermally reversible bond is a bond that is capable of evanescing at a temperature which is lower than the degradation temperature of the polymer fragments. The thermally reversible bond may be, for example, a thermally reversible aromatic urethane bond.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: February 13, 1996
    Assignee: Kimberly-Clark Corporation
    Inventors: Fidelis C. Onwumere, Jose F. Pazos
  • Methods and devices for measuring total polar compounds in degrading oils
    Patent number: 7390666
    Abstract: This invention relates to methods for determining whether or not to discard a sample of oil based on the presence of polar compounds in the oil and devices to be used therewith. In a preferred embodiment a test strip including an adsorbent affixed to a backing is spotted with a polar indicator. A sample of oil is positioned on a heat conducting device supporting the test strip and the oil is allowed to migrate over the adsorbent material thereby displacing the polar indicator in an amount related to the amount of polar compounds in the oil. This displacement is correlated to the amount of polar compounds in the sample.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: June 24, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Fidelis C. Onwumere, Robert A. Pranis, Jack G. Truong
  • Meltblown nonwoven webs made from epoxy/pcl blends
    Patent number: 5100435
    Abstract: Epoxy-based nonwoven webs are provided. The webs are formed by meltblowing a blend of an epoxy resin and a polycaprolactone (PCL) polymer. Whereas epoxy resins by themselves produce nonwoven webs which are brittle and glassy, epoxy/PCL blends have been found to produce webs which have good flexibility and elongation and are not glassy. If desired, once formed, the epoxy/PCL webs can be cured with, for example, an epoxy crosslinking agent to produce webs having enhanced solvent resistance properties.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: March 31, 1992
    Assignee: Kimberly-Clark Corporation
    Inventor: Fidelis C. Onwumere
  • Methods and devices for measuring total polar compounds in degrading oils
    Patent number: 6436713
    Abstract: The invention relates to methods for determining whether or not to discard a sample of oil based on the presence of polar compounds in oil and devices to be used to determine the presence of polar compounds in oil. In a preferred embodiment, a test strip comprising an adsorbent affixed to a backing is spotted with a polar indicator. A sample of oil is positioned on a heat conducting device supporting the test strip and the oil is allowed to migrate over the adsorbent material, thereby displacing the polar indicator in an amount related to the amount of polar compounds in the oil. This displacement is correlated to the amount of polar compounds in the sample.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: August 20, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Fidelis C. Onwumere, Robert A. Pranis, Jack G. Truong
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