Patents by Inventor Toshihide Murakami
Toshihide Murakami 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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Patent number: 11709302Abstract: Provided is a phase difference film formed of a resin containing a polymer having crystallizability. The phase difference film has an NZ factor of less than 1 and an in-plane retardation Re that satisfies 125 nm?Re?345 nm. The polymer has a crystallization degree of 15% or more. Alternatively, the polymer is an alicyclic structure-containing polymer being a hydrogenated product of a ring-opening polymer of dicyclopentadiene.Type: GrantFiled: April 28, 2022Date of Patent: July 25, 2023Assignee: ZEON CORPORATIONInventor: Toshihide Murakami
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Publication number: 20220252774Abstract: Provided is a phase difference film formed of a resin containing a polymer having crystallizability. The phase difference film has an NZ factor of less than 1 and an in-plane retardation Re that satisfies 125 nm?Re?345 nm. The polymer has a crystallization degree of 15% or more. Alternatively, the polymer is an alicyclic structure-containing polymer being a hydrogenated product of a ring-opening polymer of dicyclopentadiene.Type: ApplicationFiled: April 28, 2022Publication date: August 11, 2022Applicant: ZEON CORPORATIONInventor: Toshihide MURAKAMI
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Patent number: 11346991Abstract: Provided is a phase difference film formed of a resin containing a polymer having crystallizability, and having an NZ factor of less than 1. A production method of the phase different film includes: bonding a second film to one or both surfaces of a first film formed of a resin containing the polymer having crystallizability and having a glass transition temperature Tg (° C.) and a melting point Tm (° C.), to obtain a third film, the second film having a shrinkage percentage in at least one direction at (Tg+30)° C. of 5% or more and 50% or less; heating the third film to Tg° C. or higher and (Tg+3)° C. or lower to obtain a fourth film; and heating the fourth film to (Tg+50)° C. or higher and (Tm?40)° C. or lower.Type: GrantFiled: June 3, 2020Date of Patent: May 31, 2022Assignee: ZEON CORPORATIONInventor: Toshihide Murakami
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Patent number: 10882244Abstract: A resin film formed of a resin containing a polymer containing an alicyclic structure and having crystallizability, wherein a crystallization degree of the polymer is 30% or more, and a thickness variation Tv of the resin film represented by the following formula (1) is 5% or less. The formula (1) is Tv [%]=[(Tmax?Tmin)/Tave]×100. In the formula (1), Tmax is a maximum value of the thickness of the resin film, Tmin is a minimum value of the thickness of the resin film, and Tave is an average value of the thickness of the resin film).Type: GrantFiled: September 25, 2017Date of Patent: January 5, 2021Assignee: ZEON CORPORATIONInventor: Toshihide Murakami
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Publication number: 20200292742Abstract: Provided is a phase difference film formed of a resin containing a polymer having crystallizability, and having an NZ factor of less than 1. A production method of the phase different film includes: bonding a second film to one or both surfaces of a first film formed of a resin containing the polymer having crystallizability and having a glass transition temperature Tg (° C.) and a melting point Tm (° C.), to obtain a third film, the second film having a shrinkage percentage in at least one direction at (Tg +30)° C. of 5% or more and 50% or less; heating the third film to Tg° C. or higher and (Tg+3)° C. or lower to obtain a fourth film; and heating the fourth film to (Tg+50)° C. or higher and (Tm?40)° C. or lower.Type: ApplicationFiled: June 3, 2020Publication date: September 17, 2020Applicant: ZEON CORPORATIONInventor: Toshihide MURAKAMI
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Patent number: 10759917Abstract: An electroconductive film including a substrate film, and an organic electroconductive layer disposed on the substrate film, wherein the substrate film is formed of a resin containing an alicyclic structure-containing polymer having crystallizability, a thickness of the substrate film is 5 ?m or more and 50 ?m or less, and a crystallization degree of the alicyclic structure-containing polymer having crystallizability is 30% or more. The alicyclic structure-containing polymer having crystallizability is preferably a hydrogenated product of a ring-opening polymer of dicyclopentadiene.Type: GrantFiled: July 14, 2017Date of Patent: September 1, 2020Assignee: ZEON CORPORATIONInventor: Toshihide Murakami
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Patent number: 10712487Abstract: Provided is a phase difference film formed of a resin containing a polymer having crystallizability, and having an NZ factor of less than 1. A production method of the phase different film includes: bonding a second film to one or both surfaces of a first film formed of a resin containing the polymer having crystallizability and having a glass transition temperature Tg (° C.) and a melting point Tm (° C.), to obtain a third film, the second film having a shrinkage percentage in at least one direction at (Tg+30)° C. of 5% or more and 50% or less; heating the third film to Tg° C. or higher and (Tg+3)° C. or lower to obtain a fourth film; and heating the fourth film to (Tg+50)° C. or higher and (Tm?40)° C. or lower.Type: GrantFiled: October 13, 2016Date of Patent: July 14, 2020Assignee: ZEON CORPORATIONInventor: Toshihide Murakami
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Patent number: 10619021Abstract: Provided is a barrier film including a resin film and a barrier layer provided on the resin film. Also provided is an electroconductive film including a resin film and an electroconductive layer provided on the resin film. The resin film is formed of a resin containing an alicyclic structure-containing polymer having crystallizability. An absolute value of a thermal size change ratio when the resin film is heated at 150° C. for 1 hour is 1% or less in any in-plane direction of the resin film.Type: GrantFiled: March 14, 2019Date of Patent: April 14, 2020Assignee: ZEON CORPORATIONInventors: Toshihide Murakami, Satoshi Yamada, Yasunori Ii
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Publication number: 20200099009Abstract: A multilayer film for an organic electroluminescent display device, including at least one substrate layer containing a crystallizable polymer, a barrier layer, and an electroconductive layer, wherein at least one of the barrier layer and the electroconductive layer is in direct contact with the substrate layer.Type: ApplicationFiled: March 19, 2018Publication date: March 26, 2020Applicant: ZEON CORPORATIONInventors: Kenji YODA, Toshihide MURAKAMI, Masaru KIKUKAWA
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Publication number: 20190248974Abstract: An electroconductive film including a substrate film, and an organic electroconductive layer disposed on the substrate film, wherein the substrate film is formed of a resin containing an alicyclic structure-containing polymer having crystallizability, a thickness of the substrate film is 5 ?m or more and 50 ?m or less, and a crystallization degree of the alicyclic structure-containing polymer having crystallizability is 30% or more. The alicyclic structure-containing polymer having crystallizability is preferably a hydrogenated product of a ring-opening polymer of dicyclopentadiene.Type: ApplicationFiled: July 14, 2017Publication date: August 15, 2019Applicant: ZEON CORPORATIONInventor: Toshihide MURAKAMI
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Publication number: 20190211169Abstract: Provided is a barrier film including a resin film and a barrier layer provided on the resin film. Also provided is an electroconductive film including a resin film and an electroconductive layer provided on the resin film. The resin film is formed of a resin containing an alicyclic structure-containing polymer having crystallizability. An absolute value of a thermal size change ratio when the resin film is heated at 150° C. for 1 hour is 1% or less in any in-plane direction of the resin film.Type: ApplicationFiled: March 14, 2019Publication date: July 11, 2019Applicant: ZEON CORPORATIONInventors: Toshihide MURAKAMI, Satoshi YAMADA, Yasunori II
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Publication number: 20190210268Abstract: A resin film formed of a resin containing a polymer containing an alicyclic structure and having crystallizability, wherein a crystallization degree of the polymer is 30% or more, and a thickness variation Tv of the resin film represented by the following formula (1) is 5% or less. The formula (1) is Tv [%]=[(Tmax?Tmin)/Tave]×100. In the formula (1), Tmax is a maximum value of the thickness of the resin film, Tmin is a minimum value of the thickness of the resin film, and Tave is an average value of the thickness of the resin film).Type: ApplicationFiled: September 25, 2017Publication date: July 11, 2019Applicant: ZEON CORPORATIONInventor: Toshihide MURAKAMI
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Patent number: 10287408Abstract: Provided is a resin film having excellent size stability in a high-temperature environment. A resin film formed of a resin containing an alicyclic structure-containing polymer having crystallizability, wherein an absolute value of a thermal size change ratio when the film is heated at 150° C. for 1 hour is 1% or less in any in-plane direction of the film. The alicyclic structure-containing polymer may preferably be a hydrogenated product of a ring-opened polymer of dicyclopentadiene. Also provided is a method for producing the resin film including a step of relaxing strain of the crystallized film while the crystallized. film is kept flat.Type: GrantFiled: October 9, 2015Date of Patent: May 14, 2019Assignee: ZEON CORPORATIONInventors: Toshihide Murakami, Satoshi Yamada, Yasunori Ii
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Publication number: 20180284333Abstract: Provided is a phase difference film formed of a resin containing a polymer having crystallizability, and having an NZ factor of less than 1. A production method of the phase different film includes: bonding a second film to one or both surfaces of a first film formed of a resin containing the polymer having crystallizability and having a glass transition temperature Tg (° C.) and a melting point Tm (° C.), to obtain a third film, the second film having a shrinkage percentage in at least one direction at (Tg+30)° C. of 5% or more and 50% or less; heating the third film to Tg° C. or higher and (Tg+3)° C. or lower to obtain a fourth film; and heating the fourth film to (Tg+50)° C. or higher and (Tm?40)° C. or lower.Type: ApplicationFiled: October 13, 2016Publication date: October 4, 2018Applicant: ZEON CORPORATIONInventor: Toshihide MURAKAMI
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Publication number: 20170306113Abstract: Provided is a resin film having excellent size stability in a high-temperature environment. A resin film formed of a resin containing an alicyclic structure-containing polymer having crystallizability, wherein an absolute value of a thermal size change ratio when the film is heated at 150° C. for 1 hour is 1% or less in any in-plane direction of the film. The alicyclic structure-containing polymer may preferably be a hydrogenated product of a ring-opened polymer of dicyclopentadiene. Also provided is a method for producing the resin film including a step of relaxing strain of the crystallized film while the crystallized. film is kept flat.Type: ApplicationFiled: October 9, 2015Publication date: October 26, 2017Applicant: ZEON CORPORATIONInventors: Toshihide MURAKAMI, Satoshi YAMADA, Yasunori II
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Patent number: 9774005Abstract: An optical layered body including: a substrate layer; a first adhesive layer disposed on one surface of the substrate layer; and a second adhesive layer disposed on an opposite surface of the first adhesive layer to the substrate layer, wherein the second adhesive layer includes particles that are capable of scattering light, and a refractive index n1 of the first adhesive layer and a refractive index n2 of the second adhesive layer satisfy 1.40?n1?1.50, 1.47?n2?1.85, and 0<n2?n1?0.45.Type: GrantFiled: June 18, 2014Date of Patent: September 26, 2017Assignee: ZEON CORPORATIONInventors: Hana Abe, Toshihide Murakami
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Publication number: 20160133876Abstract: An optical layered body including: a substrate layer; a first adhesive layer disposed on one surface of the substrate layer; and a second adhesive layer disposed on an opposite surface of the first adhesive layer to the substrate layer, wherein the second adhesive layer includes particles that are capable of scattering light, and a refractive index n1 of the first adhesive layer and a refractive index n2 of the second adhesive layer satisfy 1.40?n1?1.50, 1.47?n2?1.85, and 0<n2?n1?0.45.Type: ApplicationFiled: June 18, 2014Publication date: May 12, 2016Inventors: Hana ABE, Toshihide MURAKAMI
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Patent number: 7872803Abstract: A lengthy grid polarizer film comprising a lengthy resin film and a plurality of grid lines provided on the surface and/or inside of the resin film and extending substantially in parallel with each other are provided, the grid lines being made of a material G being 1.0 or more in the absolute value of the difference between the real part n1 and the imaginary part ?1 of the complex refractive index (N1=n1?i?1), said resin film having a plurality of rows of grooves formed extending substantially in parallel with each other on its surface, and said grid line being made of a thin film of the laminated material G on the bottom face of the grooves and/or on the top face of ridges located between the adjacent grooves. A lengthy optical laminated body comprises the lengthy grid polarizer film and another lengthy polarizing optical film.Type: GrantFiled: May 29, 2006Date of Patent: January 18, 2011Assignee: Zeon CorporationInventors: Mitsugu Uejima, Toshihide Murakami, Akiyoshi Shibuya, Megumi Fujita, Masahiko Hayashi, Kohei Arakawa
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Patent number: 7781035Abstract: A container for precision substrate having one or more component formed by molding a thermoplastic resin, characterized in that the component satisfies characteristics [1] and [2] below. [1] When being brought to contact ultra high purity argon gas (impurity concentration: 1 ppb or less) at 25° C. having a flow rate of 1.2 L/min., a water amount in said argon gas after 300 minutes is 30 ppb or less per a surface area 1 cm2 of the component. [2] When being placed in the air at 100° C., an increase amount of organics in the air in 300 minutes is 150 ng or less per weight 1 g of the component. According to the container, demands for low contamination can be satisfied.Type: GrantFiled: August 28, 2002Date of Patent: August 24, 2010Assignees: Zeon CorporationInventors: Toshihiko Jimbo, Toshihide Murakami, Tadahiro Ohmi
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Publication number: 20100103518Abstract: There is provided a grid polarizer comprising: a transparent substrate having ridges arranged substantially in parallel in at least one surface of the transparent substrate; a light-absorbing layer (A) deposited on a top surface of the ridge; and a light-absorbing layer (B) deposited in a groove between the ridges, in which, in a cross section that orthogonally intersects a longitudinal direction of the ridge, cross-sectional area of the light-absorbing layer (B) is 20% or more of cross-sectional area of the space of the groove, height of the ridge is less than 4 times distance between the light-absorbing layer (A) and the light-absorbing layer (B) and height of the ridge is 0.4 to 1.55 times width of the ridge.Type: ApplicationFiled: February 19, 2008Publication date: April 29, 2010Applicant: Zeon CorporationInventors: Mitsugu Uejima, Toshihide Murakami