Patents by Inventor Eilif Strand

Eilif Strand 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: 5785790
    Abstract: A transfer with durable images comprising a support sheet having a monolayer of transparent microspheres that are partially embedded in the support sheet with a specularly reflecting layer covering the parts of the surfaces of the microspheres which are exposed above the support sheet. One or more coatings of two-component colors can be printed imagewise on top of the layer of microspheres. The two-component colors are based on a polyester resin an isocyanate hardener.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: July 28, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ulf N. Olsen, Erik Franke, Eilif Strand
  • Patent number: 5679198
    Abstract: A transfer that is produced by the steps comprising: (a) printing imagewise on a support sheet that has a layer of microspheres embedded therein one or more colored layers that are prepared from a polyester resin and an isocyanate hardener, (b) if more than one colored layer is printed, drying each color layer separately before the next layer is primed, and applying over all the layers a layer of a corresponding two-component extender or a polyester-based glue, and (c) while the single-color layer or the extender layer is still wet, applying a powder of a polyester or polyamide based elastomer, and fusing the powder into the color layer or the extender and color layers.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: October 21, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ulf N. Olsen, Erik Franke, Eilif Strand
  • Patent number: 5612119
    Abstract: A transfer for decorating surfaces comprises microspheres that are embedded about one-fourth to one-half the microsphere's diameter in a support sheet. The embedded portion of the microspheres have a reflective layer associated therewith to allow a retroreflective article that is stripped from the transfer to retroreflect light. One or more colored layers are printed imagewise one the microspheres. The color layers are prepared from a polyester resin and an isocyanate hardener. If more than one color layer is printed on the microspheres, then a two-component extender or a glue that contains a polyester is disposed on top of all the colored layers. An elastomer that contains a polyester or polyamide is then applied over either a single color layer or a multiple color layers and the extender layer or the polyester containing glue while either is still wet. The elastomer is fused into the single color layer or the extender layer or polyester containing glue and colored layers.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: March 18, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ulf N. Olsen, Erik Franke, Eilif Strand
  • Patent number: 5510178
    Abstract: A transfer with durable images comprising a support sheet having a monolayer of transparent microspheres that are partially embedded in the support sheet with a specularly reflecting layer covering the parts of the surfaces of the microspheres which are exposed above the support sheet. One or more coatings of two-component colors can be printed imagewise on top of the layer of microspheres. The two-component colors are based on polyester resin and an isocyanate hardener.
    Type: Grant
    Filed: June 23, 1993
    Date of Patent: April 23, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ulf N. Olsen, Erik Franke, Eilif Strand