Patents by Inventor David C. Koskenmaki

David C. Koskenmaki 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: 7237330
    Abstract: Conductive circuits and methods of making conductive circuits are disclosed.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: July 3, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: David C. Koskenmaki, David W. Kuhns
  • Patent number: 7070727
    Abstract: A unitary polymer substrate having a plurality of microfibers projecting from a surface is provided. The presence of the microfibers greatly increases the surface area and can impart a cloth-like feel to the surface. The projecting microfibers may have a variety of forms, including frayed-end microfibers, tapered microfibers, microfibers having an expanded cross-sectional shape, and microfibers having a very high aspect ratio. A number of methods of producing unitary polymer structures with a plurality of projecting microfibers are also provided.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: July 4, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Clyde D. Calhoun, David C. Koskenmaki, James G. Berg, Jennifer M. Aamodt
  • Patent number: 6929849
    Abstract: A method for making a fine electrically conductive grid embedded in a polymer substrate. The method includes the steps of providing a polymer substrate, forming a pattern of grooves in the substrate, filling the grooves with electrically conductive powder, and then applying heat and/or pressure to the substrate. The application of heat and/or pressure to the substrate causes the grooves to collapse inward against the conductive powder. Collapsing the grooves compacts the conductive powder within the groove, thereby establishing a continuously conductive grid line or circuit. The narrow grid lines that result allow more light to transmit through the substrate. The method allows grid lines to be made with higher aspect ratios (ratio of line depth to line width) than is possible by previous methods.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: August 16, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: David C. Koskenmaki, Michael N. Miller, Naiyong Jing
  • Patent number: 6816125
    Abstract: Manufacturing techniques are described for forming electrical components. For example, a layer of a metal powder composition is deposited onto at least a portion of a substrate. Pressure is applied to the metal powder composition by hydraulic press that has one or more projections in order to capture a pattern on the substrate. The metal powder composition compressed by the projections of the hydraulic press adhere to the substrate to form the captured pattern. The metal powder composition in regions not compressed by the projections of hydraulic press do not adhere to the substrate and may be removed. The metal powder composition may be compressed to form electrical components, such as antennae, capacitor plates, conduction pads and the like, for use in an electronic surveillance system (EAS), a radio frequency identification (RFID) system, or the like.
    Type: Grant
    Filed: March 1, 2003
    Date of Patent: November 9, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: David W. Kuhns, David C. Koskenmaki
  • Patent number: 6805940
    Abstract: A method for making an electrically conductive pattern, including: (a) depositing on a substrate a metal powder composition consisting essentially of at least one metal powder, wherein the substrate is selected from the group consisting of paper and materials that are at least about 10% compressible; and (b) densifying the composition to form a conductive pattern on the substrate.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: October 19, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: David C. Koskenmaki, David W. Kuhns
  • Publication number: 20040174257
    Abstract: Manufacturing techniques are described for forming electrical components. For example, a layer of a metal powder composition is deposited onto at least a portion of a substrate. Pressure is applied to the metal powder composition by hydraulic press that has one or more projections in order to capture a pattern on the substrate. The metal powder composition compressed by the projections of the hydraulic press adhere to the substrate to form the captured pattern. The metal powder composition in regions not compressed by the projections of hydraulic press do not adhere to the substrate and may be removed. The metal powder composition may be compressed to form electrical components, such as antennae, capacitor plates, conduction pads and the like, for use in an electronic surveillance system (EAS), a radio frequency identification (RFID) system, or the like.
    Type: Application
    Filed: March 1, 2003
    Publication date: September 9, 2004
    Inventors: David W. Kuhns, David C. Koskenmaki
  • Publication number: 20040005434
    Abstract: A unitary polymer substrate having a plurality of microfibers projecting from a surface is provided. The presence of the microfibers greatly increases the surface area and can impart a cloth-like feel to the surface. The projecting microfibers may have a variety of forms, including frayed-end microfibers, tapered microfibers, microfibers having an expanded cross-sectional shape, and microfibers having a very high aspect ratio. A number of methods of producing unitary polymer structures with a plurality of projecting microfibers are also provided.
    Type: Application
    Filed: June 20, 2003
    Publication date: January 8, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Clyde D. Calhoun, David C. Koskenmaki, James G. Berg, Jennifer M. Aamodt
  • Patent number: 6669745
    Abstract: The invention provides abrasive articles with optimally oriented abrasive particles and a method of making the same. The method involves contacting a substrate with the contact and mating surfaces of tools to provide an embossed substrate with perforated depressions, distributing abrasive particles within the depressions of the substrate, optimally orienting each abrasive particle in the depression containing the abrasive particle, creating a differential pressure between the top surface and the back surface of the embossed, perforated sheet wherein a lower pressure is applied to the back surface to hold the oriented abrasive particles within its depression while removing at least a major portion of abrasive particles not within the depressions from the top surface of the sheet and permanently bonding the abrasive particles in the depressions after they are optimally oriented to provide the abrasive product.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: December 30, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Paul D. Prichard, Kyung H. Moh, David C. Koskenmaki
  • Publication number: 20030196830
    Abstract: A method for making a fine electrically conductive grid embedded in a polymer substrate. The method includes the steps of providing a polymer substrate, forming a pattern of grooves in the substrate, filling the grooves with electrically conductive powder, and then applying heat and/or pressure to the substrate. The application of heat and/or pressure to the substrate causes the grooves to collapse inward against the conductive powder. Collapsing the grooves compacts the conductive powder within the groove, thereby establishing a continuously conductive grid line or circuit. The narrow grid lines that result allow more light to transmit through the substrate. The method allows grid lines to be made with higher aspect ratios (ratio of line depth to line width) than is possible by previous methods.
    Type: Application
    Filed: May 21, 2003
    Publication date: October 23, 2003
    Applicant: 3M Innnovative Properties Company
    Inventors: David C. Koskenmaki, Michael N. Miller, Naiyong Jing
  • Patent number: 6605332
    Abstract: A unitary polymer substrate having a plurality of microfibers projecting from a surface is provided. The presence of the microfibers greatly increases the surface area and can impart a cloth-like feel to the surface. The projecting microfibers may have a variety of forms, including frayed-end microfibers, tapered microfibers, microfibers having an expanded cross-sectional shape, and microfibers having a very high aspect ratio. A number of methods of producing unitary polymer structures with a plurality of projecting microfibers are also provided.
    Type: Grant
    Filed: July 29, 1997
    Date of Patent: August 12, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Clyde D. Calhoun, David C. Koskenmaki, James G. Berg, Jennifer M. Aamodt
  • Patent number: 6591496
    Abstract: A method for making a fine electrically conductive grid embedded in a polymer substrate. The method includes the steps of providing a polymer substrate, forming a pattern of grooves in the substrate, filling the grooves with electrically conductive powder, and then applying heat and/or pressure to the substrate. The application of heat and/or pressure to the substrate causes the grooves to collapse inward against the conductive powder. Collapsing the grooves compacts the conductive powder within the groove, thereby establishing a continuously conductive grid line or circuit. The narrow grid lines that result allow more light to transmit through the substrate. The method allows grid lines to be made with higher aspect ratios (ratio of line depth to line width) than is possible by previous methods.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: July 15, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: David C. Koskenmaki, Michael N. Miller, Naiyong Jing
  • Publication number: 20030091789
    Abstract: A method for making an electrically conductive pattern, including:
    Type: Application
    Filed: September 10, 2001
    Publication date: May 15, 2003
    Inventors: David C. Koskenmaki, David W. Kuhns
  • Publication number: 20030042045
    Abstract: A method for making a fine electrically conductive grid embedded in a polymer substrate. The method includes the steps of providing a polymer substrate, forming a pattern of grooves in the substrate, filling the grooves with electrically conductive powder, and then applying heat and/or pressure to the substrate. The application of heat and/or pressure to the substrate causes the grooves to collapse inward against the conductive powder. Collapsing the grooves compacts the conductive powder within the groove, thereby establishing a continuously conductive grid line or circuit. The narrow grid lines that result allow more light to transmit through the substrate. The method allows grid lines to be made with higher aspect ratios (ratio of line depth to line width) than is possible by previous methods.
    Type: Application
    Filed: August 28, 2001
    Publication date: March 6, 2003
    Inventors: David C. Koskenmaki, Michael N. Miller, Naiyong Jing
  • Publication number: 20030009949
    Abstract: The invention provides abrasive articles with optimally oriented abrasive particles and a method of making the same. The method involves contacting a substrate with the contact and mating surfaces of tools to provide an embossed substrate with perforated depressions, distributing abrasive particles within the depressions of the substrate, optimally orienting each abrasive particle in the depression containing the abrasive particle, creating a differential pressure between the top surface and the back surface of the embossed, perforated sheet wherein a lower pressure is applied to the back surface to hold the oriented abrasive particles within its depression while removing at least a major portion of abrasive particles not within the depressions from the top surface of the sheet and permanently bonding the abrasive particles in the depressions after they are optimally oriented to provide the abrasive product.
    Type: Application
    Filed: February 21, 2001
    Publication date: January 16, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Paul D. Prichard, Kyung H. Moh, David C. Koskenmaki
  • Publication number: 20010036529
    Abstract: A unitary polymer substrate having a plurality of microfibers projecting from a surface is provided. The presence of the microfibers greatly increases the surface area and can impart a cloth-like feel to the surface. The projecting microfibers may have a variety of forms, including frayed-end microfibers, tapered microfibers, microfibers having an expanded cross-sectional shape, and microfibers having a very high aspect ratio. A number of methods of producing unitary polymer structures with a plurality of projecting microfibers are also provided.
    Type: Application
    Filed: July 29, 1997
    Publication date: November 1, 2001
    Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
    Inventors: CLYDE D. CALHOUN, DAVID C. KOSKENMAKI, JAMES G. BERG, JENNIFER M. AAMODT
  • Publication number: 20010020636
    Abstract: The present invention relates to a method for making an array of metal balls. The method includes the step of generating a first pattern on a metal foil which includes a plurality of foil projections. The method also includes the step of generating a second pattern on a carrier substrate. The second pattern includes a plurality of carrier recesses that are arranged and configured to correspond with the foil projections of the first pattern. The method further includes the steps of placing the metal foil and the carrier substrate together such that the foil projections of the metal foil fit within the carrier recesses of the carrier substrate, and melting the metal foil such that the foil projections form metal balls positioned within the carrier recesses of the carrier substrate. The invention also relates to metal ball arrays constructed via the above method.
    Type: Application
    Filed: April 5, 2001
    Publication date: September 13, 2001
    Applicant: 3M Innovative Properties Company
    Inventors: David C. Koskenmaki, Randolph D. Schueller, Robert P. McCollam
  • Patent number: 6000603
    Abstract: The present invention relates to a method for making an array of metal balls. The method includes the step of generating a first pattern on a metal foil which includes a plurality of foil projections. The method also includes the step of generating a second pattern on a carrier substrate. The second pattern includes a plurality of carrier recesses that are arranged and configured to correspond with the foil projections of the first pattern. The method further includes the steps of placing the metal foil and the carrier substrate together such that the foil projections of the metal foil fit within the carrier recesses of the carrier substrate, and melting the metal foil such that the foil projections form metal balls positioned within the carrier recesses of the carrier substrate. The invention also relates to metal ball arrays constructed via the above method.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: December 14, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: David C. Koskenmaki, Randolph D. Schueller, Robert P. McCollam
  • Patent number: 5897930
    Abstract: A carrier web having at least one surface that is multiple, sequentially embossed, wherein depressions created from the prior embossing patterns(s) are preserved during the subsequent embossing pattern(s) even though the subsequent embossing pattern(s) are superimposed on the depressions from the prior embossing pattern(s). The patterns of embossing can be Euclidean or fractal created from machine tools produced using microreplication and other techniques. The carrier webs are useful for release liners for pressure sensitive adhesives and a number of other industrial and consumer applications.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: April 27, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Clyde D. Calhoun, David C. Koskenmaki
  • Patent number: 5869412
    Abstract: A thermoformable add-on EMI shielding sheet comprising a carrier material selected from polymeric films and fibrous webs having the capability of becoming porous when thermoformed, having a metal mat at least partially embedded therein, comprising a plurality of fine, randomly-oriented metal fibers, the carrier material having a softening temperature lower than the highest temperature reached during the thermoforming process.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: February 9, 1999
    Assignee: Minnesota Mining & Manufacturing Co.
    Inventors: Donald M. Yenni, Jr., Robert L. Lambert, Jr., Clyde D. Calhoun, David C. Koskenmaki, David J. Lundin
  • Patent number: 5738939
    Abstract: The present invention provides adhesive articles that include more than one adhesive, or if one adhesive is used, include more than one adhesive portion, where, in each portion, the extent of cure of the adhesive is varied in a predetermined manner so that each adhesive portion behaves as if it were two or more different adhesives. The adhesive articles of the present invention are typically provided as adhesive tapes, often in the form of a tape having a longitudinal dimension (down-web dimension) that far exceeds its width (cross-web dimension).
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: April 14, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Clyde D. Calhoun, David C. Koskenmaki