Patents by Inventor Francis K. Didden

Francis K. Didden 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).

  • Publication number: 20150083646
    Abstract: Apparatus is provided featuring a first and second cells. The first cell receives an ore slurry having mineral particles of interest, receives unexpanded polymer microspheres comprising a surface having mineral collector chemistry attached thereto with molecules for attaching the mineral particles of interest, causes the unexpanded polymer microspheres to expand substantially in volume into expanded polymer microspheres having a substantially increased sphere surface area, and provides an expanded polymer microsphere foam layer comprising the expanded polymer microspheres with attached mineral particles of interest. The second cell receives the expanded polymer microsphere foam layer, and causes the expanded polymer microspheres to collapse substantially in volume into collapsed polymer microspheres having a substantially reduced sphere surface area that results in a mechanical shearing off of the attached mineral particles of interest.
    Type: Application
    Filed: April 1, 2013
    Publication date: March 26, 2015
    Inventors: Francis K. Didden, Alan D. Kersey, Michael A. Davis, Paul J. Rothman, Mark R. Fernald, Christian V. O'Keefe, Douglas H. Adamson
  • Publication number: 20140227520
    Abstract: A synthetic bead for use in mineral separation is described. The synthetic bead has a surface made of a synthetic material such as polymer and the synthetic material is functionalized with molecules having a functional group for attracting mineral particles to the surface in a separation process. The synthetic beads can be placed in flotation cell containing a mixture of water, valuable material and unwanted material or in a pipeline where the mixture is transported from one location to another. The enriched synthetic beads carrying the mineral particles are separated from the unwanted materials in the mixture. The mineral particles are then released from the synthetic beads by means of low pH treatment, ultrasonic agitation, thermal or electromagnetic treatment.
    Type: Application
    Filed: May 25, 2012
    Publication date: August 14, 2014
    Applicant: CiDRA Corporate Services Inc.
    Inventors: Paul J. Rothman, Mark R. Fernald, Francis K. Didden, Christian V. O'Keefe, Alan D. Kersey, Douglas H. Adamson
  • Publication number: 20140202959
    Abstract: A synthetic bead for use in mineral separation is described. The synthetic bead has a surface made of or coated with a synthetic material such as a polymer that is naturally hydrophobic or a polymer that is hydrophobically modified. The synthetic bead can be made of glass having a coating or polysiloxane. The synthetic beads can be placed in flotation cell containing a mixture of water, collector molecules, valuable material and unwanted material or in a pipeline where the mixture is transported from one location to another. The collector chemical can be xanthates. The enriched synthetic beads carrying the mineral particles are separated from the unwanted materials in the mixture. The mineral particles are then released from the synthetic beads by means of low pH treatment, ultrasonic agitation, thermal or electromagnetic treatment.
    Type: Application
    Filed: May 25, 2012
    Publication date: July 24, 2014
    Applicant: CIDRA CORPORATE SERVICES INC.
    Inventors: Paul J. Rothman, Mark R. Fernald, Francis K. Didden, Christian V. O'Keefe, Alan D. Kersey, Douglas H. Adamson
  • Publication number: 20140199217
    Abstract: An apparatus for collecting mineral particles in a slurry or the tailings is disclosed. The apparatus may take the form of a filter, a conveyor belt or an impeller to be used in a processor to collect mineral particles in the slurry, or in a tailings pond to collect mineral particles in the tailings. The filter, conveyor belt or impeller has a collection area made of or coated with a synthetic material having a functional group, either anionic or cationic to attach to the mineral particles. Alternatively, the synthetic material has hydrophobic molecules to render the collection area hydrophobic. When the mineral particles in the slurry or tailings are combined with collector molecules, the mineral particles also become hydrophobic. The hydrophobic mineral particles are attracted to the hydrophobic collection area. The filter, conveyor belt and impeller may have a plurality of passage ways in order to increase the contacting surfaces.
    Type: Application
    Filed: May 25, 2012
    Publication date: July 17, 2014
    Applicant: CIDRA CORPORATE SERVICES INC.
    Inventors: Paul J. Rothman, Mark R. Fernald, Francis K. Didden, Douglas H. Adamson
  • Publication number: 20140197077
    Abstract: A synthetic bead for use in mineral separation is described. The synthetic bead has a surface made of a synthetic material such as polymer and the synthetic material is functionalized with molecules having a functional group for attaching mineral particles to the surface in a separation process. The synthetic beads can be placed in flotation cell containing a mixture of water, valuable material and unwanted material or in a pipeline where the mixture is transported from one location to another. The enriched synthetic beads carrying the mineral particles are separated from the unwanted materials in the mixture. The mineral particles are then released from the synthetic beads by means of low pH treatment, ultrasonic agitation, thermal or electromagnetic treatment.
    Type: Application
    Filed: May 25, 2012
    Publication date: July 17, 2014
    Applicant: CiDRA CORPORATE SERVICES INC.
    Inventors: Paul J. Rothman, Mark R. Fernald, Francis K. Didden, Christian V. O'keefe, Douglas H. Adamson
  • Publication number: 20140190873
    Abstract: Apparatus featuring synthetic bubbles or beads and a flotation stage. The synthetic bubbles or beads are configured with a polymer or polymer-based material functionalized to attach to the valuable material in a mixture to form at least some enriched synthetic bubbles or beads having the valuable material attached thereto, and also configured to be transported through the mixture based at least partly on a characteristic of the synthetic bubbles or beads. The flotation stage has the mixture containing valuable material, and is configured to receive the synthetic bubbles or beads and to provide the at least some enriched synthetic bubbles or beads having the valuable material attached thereto based at least partly the characteristic of the synthetic bubbles or beads.
    Type: Application
    Filed: May 25, 2012
    Publication date: July 10, 2014
    Applicant: CIDRA CORPORATE SERVICES INC.
    Inventors: Paul J. Rothman, Mark R. Fernald, Francis K. Didden, Douglas H. Adamson
  • Publication number: 20140183104
    Abstract: Apparatus for use in, or forming part of, a separation process to be implemented in separation processor technology, the apparatus comprising synthetic bubbles or beads configured with a polymer or polymer-based material functionalized to attach to a valuable material in a mixture so as to form an enriched synthetic bubbles or beads having the valuable material attached thereto, and also configured to be separated from the mixture based at least partly on a difference in a physical property between the enriched synthetic bubbles or beads having the valuable material attached thereto and the mixture.
    Type: Application
    Filed: May 25, 2012
    Publication date: July 3, 2014
    Applicant: CIDRA CORPORATE SERVICES INC.
    Inventors: Paul J. Rothman, Mark R. Fernald, Francis K. Didden, Christian V. O'keefe, Alan D. Kersey, Douglas H. Adamson
  • Publication number: 20140166585
    Abstract: Apparatus, such as a flotation separation device, features a flotation cell or column configured to receive a mixture of water, valuable material and unwanted material; receive polymer-based materials, including polymer bubbles or beads, configured to attach to the valuable material in the mixture; and provide enriched polymer-based materials, including enriched polymer bubbles or beads, having the valuable material attached thereon.
    Type: Application
    Filed: May 25, 2012
    Publication date: June 19, 2014
    Applicant: CIDRA CORPORATE SERVICES INC.
    Inventors: Paul J. Rothman, Mark R. Fernald, Francis K. Didden, Christian V. O'Keefe, Alan D. Kersey, Douglas H. Adamson
  • Publication number: 20140138324
    Abstract: A machine or apparatus featuring a first processor and a second processor. The first processor is configured to receive a mixture of fluid, valuable material and unwanted material and a functionalized polymer coated member configured to attach to the valuable material in an attachment rich environment, and provide an enriched functionalized polymer coated member having the valuable material attached thereto. The second processor is configured to receive a fluid and the enriched functionalized polymer coated member in a release rich environment to release the valuable material, and provide the valuable material released from the enriched functionalized polymer coated member.
    Type: Application
    Filed: May 25, 2012
    Publication date: May 22, 2014
    Applicant: CIDRA CORPORATE SERVICES INC.
    Inventors: Paul J. Rothman, Mark R. Fernald, Francis K. Didden, Christian V. O'Keefe, Douglas H. Adamson