Patents by Inventor Ronald J. Tabar
Ronald J. Tabar 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: 20080128927Abstract: Methods of making optical films having continuous phase/disperse phase morphology are disclosed which can control the nature of the disperse phase in such films to yield enhanced optical properties. When used in liquid crystal displays and the like, the films can increase the screen luminance beyond that achievable with known continuous phase/disperse phase optical films.Type: ApplicationFiled: October 16, 2007Publication date: June 5, 2008Inventors: Ronald J. Tabar, Susan L. Kent, Richard C. Allen
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Patent number: 6934082Abstract: Optical devices using reflective polarizers and, in particular, diffusely reflective polarizers are provided. Many of the optical devices utilize the diffusely reflecting and specularly transmitting properties of diffusely reflecting polarizers to enhance their optical characteristics. The optical devices include a lighting system which uses a reflector formed from a diffusely reflecting polarizer attached to a specular reflector. Another optical device is a display apparatus which uses a diffusely reflecting polarizer layer in combination with a turning lens which folds shallow angle light toward a light modulating layer. Other optical devices exploit the depolarizing characteristics of a diffusely reflecting polarizer when reflecting light. Still other optical devices use diffusely reflecting polarizers to recycle light and improve display illumination.Type: GrantFiled: June 28, 2004Date of Patent: August 23, 2005Assignee: 3M Innovative Properties CompanyInventors: Richard C. Allen, Sanford Cobb, Jr., Elisa M. Cross, Susan L. Kent, Timothy J. Nevitt, Andrew J. Ouderkirk, Ronald J. Tabar, David L. Wortman
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Patent number: 6829071Abstract: Optical devices using reflective polarizers and, in particular, diffusely reflective polarizers are provided. Many of the optical devices utilize the diffusely reflecting and specularly transmitting properties of diffusely reflecting polarizers to enhance their optical characteristics. The optical devices include a lighting system which uses a reflector formed from a diffusely reflecting polarizer attached to a specular reflector. Another optical device is a display apparatus which uses a diffusely reflecting polarizer layer in combination with a turning lens which folds shallow angle light toward a light modulating layer. Other optical devices exploit the depolarizing characteristics of a diffusely reflecting polarizer when reflecting light. Still other optical devices use diffusely reflecting polarizers to recycle light and improve display illumination.Type: GrantFiled: May 31, 2001Date of Patent: December 7, 2004Assignee: 3M Innovative Properties CompanyInventors: Richard C. Allen, Elisa M. Cross, Ronald J. Tabar
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Publication number: 20040164434Abstract: Methods of making optical films having continuous phase/disperse phase morphology are disclosed which can control the nature of the disperse phase in such films to yield enhanced optical properties. When used in liquid crystal displays and the like, the films can increase the screen luminance beyond that achievable with known continuous phase/disperse phase optical films.Type: ApplicationFiled: October 23, 2003Publication date: August 26, 2004Inventors: Ronald J. Tabar, Susan L. Kent, Richard C. Allen
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Patent number: 6673275Abstract: An improved optical film having a continuous/disperse phase morphology and a method for making the same is provided. At least one of the continuous and disperse phases comprises a blend of homopolymers which are inter-reacted, as by transesterification. The resulting films exhibit a higher degree of birefringence for a given level of strain than analogous films in which the blend is replaced by a random copolymer.Type: GrantFiled: October 11, 2000Date of Patent: January 6, 2004Assignee: 3M Innovative Properties CompanyInventors: Richard C. Allen, Susan L. Kent, Ronald J. Tabar, Elisa M. Cross, William Ward Merrill, Stephen A. Johnson, Peter D. Condo, Timothy J. Hebrink, Joseph A. Gangi
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Patent number: 6654170Abstract: An improved optical film having a continuous/disperse phase morphology and a method for making the same is provided. At least one of the continuous and disperse phases comprises a blend of homopolymers which are inter-reacted, as by transesterification. The resulting films exhibit a higher degree of birefringence for a given level of strain than analogous films in which the blend is replaced by a random copolymer.Type: GrantFiled: October 11, 2000Date of Patent: November 25, 2003Assignee: 3M Innovative Properties CompanyInventors: William Ward Merrill, Susan L. Kent, Ronald J. Tabar, Richard C. Allen, Elisa M. Cross, Stephen A. Johnson, Peter D. Condo, Timothy J. Hebrink, Joseph A. Gangi
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Patent number: 6627300Abstract: An improved optical film having a continuous/disperse phase morphology and a method for making the same is provided. At least one of the continuous and disperse phases comprises a blend of homopolymers which are inter-reacted, as by transesterification. The resulting films exhibit a higher degree of birefringence for a given level of strain than analogous films in which the blend is replaced by a random copolymer.Type: GrantFiled: October 11, 2000Date of Patent: September 30, 2003Assignee: 3M Innovative Properties CompanyInventors: Susan L. Kent, Ronald J. Tabar, Richard C. Allen, Elisa M. Cross, William Ward Merrill, Stephen A. Johnson, Peter D. Condo, Timothy J. Hebrink, Joseph A. Gangi
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Patent number: 6329046Abstract: Optical films and processes for forming the optical films are described in which materials having different properties are used and the different properties are exploited to obtain improved optical and/or mechanical properties of the optical film. The different properties of the materials may be used to select processing conditions under which the materials will react differently. The film may be processed with respect to two different directions with the amount of molecular orientation, if any, induced by the process being separately controlled for each material and each direction.Type: GrantFiled: October 18, 1999Date of Patent: December 11, 2001Assignee: 3M Innovative PropertiesInventors: William W. Merrill, Richard C. Allen, Ronald J. Tabar, Peter D. Condo, Timothy J. Nevitt
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Publication number: 20010036013Abstract: Optical devices using reflective polarizers and, in particular, diffusely reflective polarizers are provided. Many of the optical devices utilize the diffusely reflecting and specularly transmitting properties of diffusely reflecting polarizers to enhance their optical characteristics. The optical devices include a lighting system which uses a reflector formed from a diffusely reflecting polarizer attached to a specular reflector. Another optical device is a display apparatus which uses a diffusely reflecting polarizer layer in combination with a turning lens which folds shallow angle light toward a light modulating layer. Other optical devices exploit the depolarizing characteristics of a diffusely reflecting polarizer when reflecting light. Still other optical devices use diffusely reflecting polarizers to recycle light and improve display illumination.Type: ApplicationFiled: May 31, 2001Publication date: November 1, 2001Applicant: 3M Innovative Properties CompanyInventors: Richard C. Allen, Sanford Cobb, Elisa M. Cross, Susan L. Kent, Timothy J. Nevitt, Andrew J. Ouderkirk, Ronald J. Tabar, David L. Wortman
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Patent number: 6274221Abstract: A novel microprismatic retroreflective film or sheeting is provided which comprises a transparent semicrystalline polymer. The microprismatic retroreflective film or sheeting of the present invention offers superior retroreflective brightness at large angles of incidence and at large observational angles. Syndiotactic vinyl aromatic polymers, especially syndiotactic polystyrene and copolymers thereof, are preferred semicrystalline polymers, as they impart good dimensional stability and resistance to moisture, and can be made resistant to UV radiation. Signing materials comprising these microprismatic retroreflective films provide improved performance for off-angle illumination and viewing in traffic control and other signing applications.Type: GrantFiled: January 29, 1999Date of Patent: August 14, 2001Assignee: 3M Innovative Properties CompanyInventors: Kenneth L. Smith, Jaime R. Ojeda, Ronald J. Tabar
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Publication number: 20010008679Abstract: A novel microprismatic retroreflective film or sheeting is provided which comprises a transparent semicrystalline polymer. The microprismatic retroreflective film or sheeting of the present invention offers superior retroreflective brightness at large angles of incidence and at large observational angles. Syndiotactic vinyl aromatic polymers, especially syndiotactic polystyrene and copolymers thereof, are preferred semicrystalline polymers, as they impart good dimensional stability and resistance to moisture, and can be made resistant to UV radiation. Signing materials comprising these microprismatic retroreflective films provide improved performance for off-angle illumination and viewing in traffic control and other signing applications.Type: ApplicationFiled: January 29, 1999Publication date: July 19, 2001Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: KENNETH L. SMITH, JAIME R. OJEDA, RONALD J. TABAR
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Patent number: 6179948Abstract: Optical films and processes for forming the optical films are described in which materials having different properties are used and the different properties are exploited to obtain improved optical and/or mechanical properties of the optical film. The different properties of the materials may be used to select processing conditions under which the materials will react differently. The film may be processed with respect to two different directions with the amount of molecular orientation, if any, induced by the process being separately controlled for each material and each direction.Type: GrantFiled: January 13, 1998Date of Patent: January 30, 2001Assignee: 3M Innovative Properties CompanyInventors: William W. Merrill, Richard C. Allen, Ronald J. Tabar, Peter D. Condo, Timothy J. Nevitt
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Patent number: 5591530Abstract: Flexible optically uniform sign face substrate comprising at least one layer of durable thermoplastic sheeting and an optically uniform dimensionally stable scrim film, and more particularly a sign face substrate comprising at least one layer of optically uniform dimensionally stable multilayer scrim film laminated between at least two layers of durable thermoplastic sheeting for use in areas such as awning, canopy, fascia or sign material construction.Type: GrantFiled: April 14, 1995Date of Patent: January 7, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Robert W. Warner, Robert C. Fitzer, David B. Redmond, Ronald J. Tabar
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Patent number: 5422189Abstract: Flexible optically uniform sign face substrate comprising at least one layer of durable thermoplastic sheeting and an optically uniform dimensionally stable scrim film, and more particularly a sign face substrate comprising at least one layer of optically uniform dimensionally stable multilayer scrim film laminated between at least two layers of durable thermoplastic sheeting for use in areas such as awning, canopy, fascia or sign material construction.Type: GrantFiled: October 1, 1992Date of Patent: June 6, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventors: Robert W. Warner, Robert C. Fitzer, Ronald J. Tabar
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Patent number: 4419480Abstract: A soft, fatigue resistant vulcanizate adapted for transmitting load between moving mechanical parts comprising (a) 100 parts by weight of crosslinked elastomer, (b) a fatigue life enhancing amount of substantially internally saturated, substantially linear polymer that (i) is made from monomers consisting essentially of isobutylene, (ii) is a strain crystallizable, elastic solid at 20.degree. C. and (iii) has a viscosity average molecular weight (Flory) above about 1.3 million, (c) about 5-200 parts by weight particulate comprising carbon black, said elastomer being crosslinked with (d) curative in an amount sufficient to crosslink said elastomer, wherein said polymer of (b) is dispersed throughout said elastomer of (a) in a discrete microscopic phase.Type: GrantFiled: August 19, 1982Date of Patent: December 6, 1983Assignee: Ford Motor CompanyInventors: Ronald J. Tabar, Paul C. Killgoar, Jr.
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Patent number: 4362840Abstract: A soft, heat and fatigue resistant vulcanizate adapted for transmitting load between moving mechanical parts comprising (a) 100 parts by weight of crosslinked elastomer consisting essentially of (i) natural or synthetic polyisoprene rubber, and (ii) elastomeric polybutadiene made from monomers consisting essentially of butadiene at a weight ratio of (i) to (ii) of about 1:10 to 10:1, (b) about 10-75 parts by weight of substantially internally saturated, substantially linear polymer that (i) is made from monomers consisting essentially of isobutylene, (ii) is a strain crystallizable, elastic solid at 20.degree. C. and (iii) has a viscosity average molecular weight (Flory) above about 1.Type: GrantFiled: October 1, 1980Date of Patent: December 7, 1982Assignee: Ford Motor CompanyInventors: Ronald J. Tabar, Paul C. Killgoar, Jr., Marvin A. Lemieux
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Patent number: 4269746Abstract: Polychloroprene compounded with large particle, high structure carbon black and finely divided silica especially when combined with certain curants and plasticizer yields, upon curing, articles which exhibit high tear resistance and low compression set and are admirably suited for high temperature, fatigue producing applications as suspension bushings.Type: GrantFiled: March 1, 1979Date of Patent: May 26, 1981Assignee: Ford Motor CompanyInventors: Ronald J. Tabar, Paul C. Killgoar, Jr.
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Patent number: 4267086Abstract: Improvements in molded articles from sinterable particulate solids, improvements in method for making such articles, and novel sacrificial binders for use in making such articles are disclosed. The sacrificial binders used in this invention comprise block polymers having the structural formulaX--B(AB).sub..eta. A].sub..eta. 'wherein "X" is a linking group, A or B, ".eta." is 0 or a positive integer, ".eta.'" is a positive integer greater than 2, "A" is a linear or branched polymer that is glassy or crystalline at room temperature and has its softening point in the range of about 80.degree. C. to about 250.degree. C. and "B" is a polymer different from A that behaves as an elastomer at processing temperatures, a plasticizer which may be oil, wax or oil and wax, and optionally other components.Type: GrantFiled: October 17, 1979Date of Patent: May 12, 1981Assignee: Ford Motor CompanyInventors: Robert A. Pett, S. Burhan A. Qaderi, Ronald J. Tabar
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Patent number: 4158688Abstract: Improvements in molded articles from sinterable particulate solids, improvements in method for making such articles, and novel sacrificial binders for use in making such articles are disclosed. The sacrificial binders used in this invention comprise block polymers having the structural formulaX--[B (AB).sub..eta. A].sub..eta.'wherein "X" is a linking group, A or B, ".eta." is 0 or a positive integer, ".eta.'" is a positive integer greater than 2, "A" is a linear or branched polymer that is glassy or crystalline at room temperature and has its softening point in the range of about 80.degree. C. to about 250.degree. C. and "B" is a polymer different from A that behaves as an elastomer at processing temperatures, a plasticizer which may be oil, wax or oil and wax, and optionally other components.Type: GrantFiled: June 27, 1977Date of Patent: June 19, 1979Assignee: Ford Motor CompanyInventors: Robert A. Pett, S. Burhan A. Qaderi, Ronald J. Tabar