Patents by Inventor David J. Hastings

David J. Hastings 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).

  • Limiting the presence of microorganisms using polymer-bound metal-containing compositions
    Patent number: 6432396
    Abstract: The present invention provides a method of limiting the presence of a microorganism by contacting the microorganism with polymer-bound metal-containing compositions. The compositions include metal-containing compounds that may be prepared by reacting or polymerizing metal-containing monomers. The microorganism may be present in a liquid that is contacted with the polymer-bound metal-containing composition. Alternatively, the microorganism may be present in a solid that is contacted with the polymer-bound metal-containing composition.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: August 13, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin D. Landgrebe, David J. Hastings, Terrance P. Smith, Gregory D. Cuny, Ashok Sengupta, Chandrika D. Mudalige, Frank A. Brandys
  • Antimicrobial composition containing photosensitizers articles, and methods of use
    Patent number: 6420455
    Abstract: Polymer compositions and articles incorporating them are provided that possess antimicrobial activity, preferably in both the light and the dark. Such compositions include one or more polymers and one or more photosensitizers.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: July 16, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin D. Landgrebe, John J. Stofko, Sheila A. Tesch, John C. Loperfido, David J. Hastings, Thomas J. Packard, Matthew T. Scholz, Linda K. Olson, Kaveh Pournoor, Monserrat R. Lalonde
  • Product and process of making a beer having increased light stability
    Patent number: 5582857
    Abstract: A process for the production of a hopped malt beer wherein a processing liquid containing riboflavin is hopped to form the desired beverage. The improvement comprises subjecting that processing liquid to an effective amount of actinic radiation of a wavelength adopted to decompose the riboflavin and thereby reduce the amount thereof, whereby a beer having enhanced light stability is obtained.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 10, 1996
    Assignee: Labatt Brewing Company Limited
    Inventors: Joseph R. L. Bordeleau, David J. Hastings, Michael J. McGarrity