Patents by Inventor Neal T. Strand
Neal T. 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).
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Publication number: 20040224126Abstract: The present invention provides perforated film constructions, sign faces including the film constructions, and signs including the sign faces, all of which are capable of having one appearance under light ambient lighting conditions, and another appearance when backlit under dark ambient lighting conditions. The construction is generally planar and includes perforations that occupy, e.g., about 10-35% of the major surfaces of the construction. The perforations are separated by an opaque land area. The back surface of the film construction in the land area (i.e., the surface that is adapted to face the interior of the sign) reflects, e.g., at least about 50% of normal light incident thereon.Type: ApplicationFiled: June 15, 2004Publication date: November 11, 2004Applicant: 3M Innovative Properties CompanyInventors: Ellen O. Aeling, Neal T. Strand
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Patent number: 6767609Abstract: The present invention provides perforated film constructions, sign faces including the film constructions, and signs including the sign faces, all of which are capable of having one appearance under light ambient lighting conditions, and another appearance when backlit under dark ambient lighting conditions. The construction is generally planar and includes perforations that occupy, e.g., about 10-35% of the major surfaces of the construction. The perforations are separated by an opaque land area. The back surface of the film construction in the land area (i.e., the surface that is adapted to face the interior of the sign) reflects, e.g., at least about 50% of normal light incident thereon.Type: GrantFiled: April 16, 2001Date of Patent: July 27, 2004Assignee: 3M Innovative Properties CompanyInventors: Ellen O. Aeling, Neal T. Strand
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Patent number: 6641880Abstract: A lighted sign housing is provided with a diffuse reflective film that is selected based on its reflectivity and luminance uniformity in order to reduce power consumption required for a given luminance while also increasing luminance uniformity. A method of using such film is also provided.Type: GrantFiled: June 30, 2000Date of Patent: November 4, 2003Assignee: 3M Innovative Properties CompanyInventors: Frank L. Deyak, Neal T. Strand, Ellen O. Aeling, Andrew J. Ouderkirk, Michael F. Weber, David G. Freier
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Patent number: 6416201Abstract: An illuminated sign system provides uniform illumination over the lamp face by using partially transmissive lamp masks located between the lamps and the sign face. The sign face itself also diffusely reflects at least a majority of light incident on its second surface back towards the interior of the sign. The lamp spacing ratio in the illuminated signs can be increased, e.g., to a ratio of 3:1 or more, and, possibly, to a ratio of 4:1 or more.Type: GrantFiled: March 31, 2000Date of Patent: July 9, 2002Assignee: 3M Innovative Properties CompanyInventors: Neal T. Strand, David G. Freier, Ellen O. Aeling
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Publication number: 20020034608Abstract: The present invention provides perforated film constructions, sign faces including the film constructions, and signs including the sign faces, all of which are capable of having one appearance under light ambient lighting conditions, and another appearance when backlit under dark ambient lighting conditions. The construction is generally planar and includes perforations that occupy, e.g., about 10-35% of the major surfaces of the construction. The perforations are separated by an opaque land area. The back surface of the film construction in the land area (i.e., the surface that is adapted to face the interior of the sign) reflects, e.g., at least about 50% of normal light incident thereon.Type: ApplicationFiled: April 16, 2001Publication date: March 21, 2002Applicant: 3M Innovative Properties CompanyInventors: Ellen O. Aeling, Neal T. Strand
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Patent number: 6282821Abstract: A low-loss, diffuser film is provided for translucent surface(s) of lighted signage. The film has little absorptivity and has partial transmissivity and partial reflectivity. Luminance efficiency and brightness are significantly improved over conventional films used in backlit signage. A luminance efficiency prediction equation is also provided to aid in selection of diffuser films and interior surfaces of the lighted sign cavity. A combination of effects of diffuser films and a diffuse reflective films lining the interior surfaces of the lighted sign cavity is unexpectedly greater than their sum of effects operating alone.Type: GrantFiled: June 25, 1998Date of Patent: September 4, 2001Assignee: 3M Innovative Properties CompanyInventors: David G. Freier, Neal T. Strand, Scott R. Kaytor, Frank L. Deyak
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Patent number: 5976686Abstract: Diffuse reflective materials attached to a structure formed by thermally induced phase separation of a thermoplastic polymer and a diluent providing enhanced flexibility and reflectivity especially in the visible wavelengths of 380-730 nanometers are described. Such materials find a wide variety of application among combinations with other reflective layers. The diffuse reflective articles are useful in backlight units of liquid crystal displays, lights, copy machines, projection system displays, facsimile apparatus, electronic blackboards, diffuse white standards, photographic lights and the like.Type: GrantFiled: October 24, 1997Date of Patent: November 2, 1999Assignee: 3M Innovative Properties CompanyInventors: Scott R. Kaytor, Kenneth A. Epstein, John C. Harvey, Stephen J. Pojar, Neal T. Strand, Clinton P. Waller, Jr., William A. Hibbard, David R. Gagnon
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Patent number: 5462768Abstract: A method of screen printing water-based chemical compositions is provided, where the water-based chemical compositions are virtually solventless, that is, having less than 12% volatile organic solvents when press ready, and the method produces screen printed substrates that are weather-resistant and have excellent color retention.Type: GrantFiled: March 18, 1993Date of Patent: October 31, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventors: Ronald R. Adkins, Charles J. Fabbrini, Neal T. Strand
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Patent number: 4791540Abstract: A light fixture providing normalized output. An undirected light source is located in an optical cavity having an optical window. A film with a smooth surface and a structured surface is placed in the optical window with the smooth surface facing the interior of the optical cavity. The structured surface has a plurality of triangular prisms thereon.Type: GrantFiled: May 26, 1987Date of Patent: December 13, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventors: John F. Dreyer, Jr., Neal T. Strand
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Patent number: 4110925Abstract: A sign cabinet having a scroll movably mounted on rollers for movement past a display opening in the cabinet. A torsion spring acts on one of the rollers to compensate for differences in the rate of movement of the scroll at the two rollers. An electronic control circuit automatically senses the position of the scroll and is actuated by the position information for controlling the operation of the scroll. The modes of operation include: continuously moving back and forth between preselected end points within the scroll; moving back and forth within a predetermined section within the end points, stopping at preselected frames within the section; and, advancing from one frame or section to another.Type: GrantFiled: March 28, 1977Date of Patent: September 5, 1978Assignee: Minnesota Mining and Manufacturing CompanyInventors: Neal T. Strand, Richard J. Esboldt