Patents by Inventor Michael D. Barrera

Michael D. Barrera 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).

  • Process for Removal of Fluoroorganic Compounds From Aqueous Media
    Publication number: 20240018084
    Abstract: The present disclosure provides a process for removing fluoroorganic acidic compounds from a solution comprising at least one protic solvent, comprising: forming a mixture of a solution comprising at least one fluoroorganic acidic compound comprising less than 15 carbon atoms and protic solvent, wherein the solution has a pH of 4, with an extraction composition comprising at least one trialkylamine and organic solvent; reacting the fluoroorganic acidic compound with the trialkylamine to form a hydrophobic ionic compound comprising the anion of the fluoroorganic acidic compound and the cation of the trialkylamine; separating the mixture into a first phase comprising the protic solvent and at most 50 wt.
    Type: Application
    Filed: July 30, 2021
    Publication date: January 18, 2024
    Inventors: Klaus Hintzer, Stefan Huber, Valentina Krupp, Herbert Koenigsmann, Scott D. Schmick, Zhongxing Zhang, Michael D. Barrera, William M. Lamanna, Chetan P. Jariwala, Markus Hirschberg
  • Method and apparatus for the photosensitization of optical fiber
    Publication number: 20040223694
    Abstract: The present invention relates to increasing the photosensitivity of optical fibers. One aspect of the present invention comprises a method for rapidly diffusing hydrogen or deuterium into an optical fiber from a gas mixture having a low total hydrogen content to generate changes in the refractive index of the optical fiber. The resulting photosensitive fiber may be used to create optical devices including Bragg gratings and Bragg grating-based devices.
    Type: Application
    Filed: April 4, 2003
    Publication date: November 11, 2004
    Inventors: William V. Dower, Nirmal K. Viswanathan, Dora M. Paolucci, Michael D. Barrera
  • Catalytic process for preparing perfluoroethanesulfonyl fluoride and/or perfluorodiethylsulfone
    Patent number: 6580006
    Abstract: The present invention provides a catalytic process for preparing perfluoroethanesulfonyl fluoride and/or perfluorodiethylsulfone using a two-part catalytic process comprising a metal fluoride and a crown ether.
    Type: Grant
    Filed: May 2, 2002
    Date of Patent: June 17, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: William M. Lamanna, Michael D. Barrera, Gerald L. Bauer, Yuri Cheburkov