Patents by Inventor Bhalchandra Karandikar

Bhalchandra Karandikar 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: 9783676
    Abstract: An antimicrobial polyurethane foam that is formed from: a multi-functional isocyanate component; an aqueous polyol component reactive with the multi-functional isocyanate component; an antimicrobial metallic compound; and a complexing agent. The complexing agent is used to form a stable blend of the antimicrobial metallic compound with the polyol component. Exemplary complexing agents include amine compounds, ammonium-containing compounds, and ammonia as well as combinations of these compounds. The antimicrobial metallic compound can be a silver, zinc, or copper compound. Desirably, the antimicrobial metallic compound is silver saccharinate. A process of making the antimicrobial polyurethane foam and stable blends used in the manufacture of the antimicrobial polyurethane foam are also disclosed.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: October 10, 2017
    Assignee: Avent, Inc.
    Inventors: Bhalchandra Karandikar, Bruce L. Gibbins
  • Publication number: 20160060458
    Abstract: An antimicrobial polyurethane foam that is formed from: a multi-functional isocyanate component; an aqueous polyol component reactive with the multi-functional isocyanate component; an antimicrobial metallic compound; and a complexing agent. The complexing agent is used to form a stable blend of the antimicrobial metallic compound with the polyol component. Exemplary complexing agents include amine compounds, ammonium-containing compounds, and ammonia as well as combinations of these compounds. The antimicrobial metallic compound can be a silver, zinc, or copper compound. Desirably, the antimicrobial metallic compound is silver saccharinate. A process of making the antimicrobial polyurethane foam and stable blends used in the manufacture of the antimicrobial polyurethane foam are also disclosed.
    Type: Application
    Filed: November 11, 2015
    Publication date: March 3, 2016
    Applicant: Avent, Inc.
    Inventors: Bhalchandra Karandikar, Bruce L. Gibbins
  • Publication number: 20070254044
    Abstract: The present invention comprises compositions and methods for providing antimicrobial compositions. The antimicrobial compositions comprise gel delivery vehicles comprising stabilized silver, wherein ionic silver is provided to a site for antimicrobial purposes. Methods of making and using such compositions are taught, including application of the silver-containing gel compositions to wounds, burns, abrasions, cuts, surgical incision, sites where skin or organ integrity has been breached, and other sites to supply an antimicrobial environment.
    Type: Application
    Filed: September 19, 2005
    Publication date: November 1, 2007
    Applicant: ACRYMED, INC.
    Inventors: Bhalchandra Karandikar, Bruce Gibbins
  • Publication number: 20070207335
    Abstract: The present invention comprises methods and compositions comprising metal nanoparticles. The invention comprises metal nanoparticles and surfaces treated with a metal nanoparticle coating. The present invention further comprises compositions for preparing nanoparticles comprising at least one stabilizing agent, one or more metal compounds, at least one reducing agent and a solvent. In one aspect, the stabilizing agent comprises a surfactant or a polymer. The polymer may comprise polymers such as polyacrylamides, polyurethanes, and polyamides. In one aspect, the metal compound comprises a salt comprising a metal cation and an anion. The anion may comprise saccharinate derivatives, long chain fatty acids, and alkyl dicarboxylates.
    Type: Application
    Filed: February 8, 2007
    Publication date: September 6, 2007
    Inventors: Bhalchandra Karandikar, Bruce Gibbins
  • Publication number: 20070003603
    Abstract: The present invention comprises methods and compositions for antimicrobial silver compositions comprising silver nanoparticles. The present invention further comprises compositions for preparing silver nanoparticles comprising at least one stabilizing agent, one or more silver compounds, at least one reducing agent and a solvent. In one aspect, the stabilizing agent comprises a surfactant or a polymer. The polymer may comprise polymers such as polyacrylamides, polyurethanes, and polyamides. In one aspect, the silver compound comprises a salt comprising a silver cation and an anion. The anion may comprise saccharinate derivatives, long chain fatty acids, and alkyl dicarboxylates. The methods of the present invention comprise treating devices with the silver nanoparticle compositions, including, but not limited to, such devices as woven wound care materials, catheters, patient care devices, and collagen matrices.
    Type: Application
    Filed: August 1, 2005
    Publication date: January 4, 2007
    Inventors: Bhalchandra Karandikar, Bruce Gibbins, Ken Cornell
  • Publication number: 20050098270
    Abstract: Two circuit bearing substrates, such as a rigid electronic circuit board and a flexible circuit film, each having large arrays or multiple arrays of surface contact pads or traces, are mechanically and electrically joined without relocating the substrates during the bonding process by using a bonding apparatus with multiple working tools or bond shoes. The bonding apparatus includes a fixture for holding the circuit bearing substrates with a joining layer between them, and two or more independently operated heated bond shoes that compress different portions of the circuit bearing substrates with the joining layer, such as a layer of anisotropic conductive film.
    Type: Application
    Filed: December 9, 2004
    Publication date: May 12, 2005
    Inventors: Bhalchandra Karandikar, Jonathan Brick, Richard Schmachtenberg
  • Patent number: 5236667
    Abstract: A method of chemically modifying the poly (methyl methacrylate) (hereinafter "PMMA") clad surface of an optical fiber to introduce amino groups. N-butyl lithium in a suitable organic solvent with ethylene diamine is applied to the clad surface of the optical fiber in a substantially oxygen-free atmosphere, such as nitrogen, at approximately 10.degree. C. to 40.degree. C. for about one to two hours. A pH-sensitive dye with isothiocyanate functionality can be bounded to the modified clad surface resulting in a pH sensor based on fiber optics.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: August 17, 1993
    Assignee: University of Pittsburgh
    Inventors: Jules B. Puschett, Krzysztof Matyjaszewski, Bhalchandra Karandikar