Patents by Inventor Osamu Okumura
Osamu Okumura 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: 5396355Abstract: A polymer film with a refractive index of n.sub.D .gtoreq.1.60, an Abbe number of .nu..sub.D .gtoreq.30.0 and a glass transition temperature of Tg=60.degree. to 160.degree. C. is oriented at least in one direction to provide an oriented film. It is arranged that this oriented film has a retardation value of R=60-1000 nm and a wavelength dispersion value of .nu..sub.RF .gtoreq.1.10. An optically compensating film comprising this oriented film or an optical compensator comprising the oriented film and an optically isotropic film laminated at least on one side thereof is used for color compensation in a liquid crystal display panel. In this manner, a liquid crystal display device solving the long-standing problems of coloration and low contrast ratio is obtained.Type: GrantFiled: April 14, 1993Date of Patent: March 7, 1995Assignees: Seiko Epson Corporation, Fujimori Kogyo Co., Ltd.Inventors: Hiroshi Wada, Shinji Wada, Osamu Okumura, Rinjiro Ichikawa, Kenji Hashimoto, Takashi Yamada
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Patent number: 5361151Abstract: A reflection-type liquid crystal (LC) device having a twisted nematic (TN) LC layer that lets linearly-polarized incident light enter and become circularly-polarized at a reflecting surface, and then linearly polarizes it, after reflecting, with a plane of polarization that has been rotated 90.degree. from the incident light at an light output surface. The TN LC layer allows linearly-polarized incident light to enter at an angle to the molecular plane of light input of the twisted nematic LC, and to linearly polarize the light after reflection. The plane of polarization is rotated 90.degree. from the incident light at the light output surface. The TN LC layer also allows circularly-polarized incident light to enter and become linearly-polarized light at the reflecting surface. Circularly-polarized light after reflection may be rotated opposite the incident circularly-polarized light at the light output surface to provide for reverse on/off states.Type: GrantFiled: October 7, 1993Date of Patent: November 1, 1994Assignee: Seiko Epson CorporationInventors: Tomio Sonehara, Osamu Okumura
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Patent number: 5343317Abstract: A polymer film from a composition comprising a polymer (A) giving a film with a refractive index of n.sub.D .gtoreq.1.60, an Abbe number of .nu..sub.D .ltoreq.30.0 and a glass transition temperature of Tg=60.degree. to 160.degree. C. and a polymer (B) giving a film with a refractive index of n.sub.D <1.60 is oriented at least in one direction to provide an oriented film. It is arranged that this oriented film has a retardation value of R-60-1000 nm and a wavelength dispersion value of .nu..sub.RF .gtoreq.1.10. An optically compensating film comprising this oriented film or an optical compensator comprising the oriented film and an optically isotropic film laminated at least on one side thereof is used for color compensation in a liquid crystal display panel. In this manner, a liquid crystal display device solving the long-standing problems of coloration and low contrast ratio is obtained.Type: GrantFiled: April 14, 1993Date of Patent: August 30, 1994Assignees: Seiko Epson Corporation, Fujimori Kogyo Co.Inventors: Hiroshi Wada, Shinji Wada, Osamu Okumura, Rinjiro Ichikawa, Kenji Hashimoto, Takashi Yamada
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Patent number: 5337174Abstract: There is provided a laminate consisting of a first oriented film (1) obtainable by drawing, at least in one direction, a polymer film having a refractive index of n.sub.D .gtoreq.1.60, an Abbe number of .nu..sub.D .gtoreq.30.0 and a glass transition temperature of Tg=60.degree. to 160.degree. C. and a second oriented film (2) obtainable by drawing, at least in one direction, a polymer film having a refractive index of n.sub.D <1.60. The laminate has a retardation value R of 60-1000 nm and a wavelength dispersion value .nu..sub.RF of not less than 1.10. This oriented film either as it is or as laminated with an optically isotropic film at least on one side is used to fabricate an optical compensator for color compensation in a liquid crystal panel. In this manner, there can be obtained a liquid crystal display panel which solves the long-standing problems of coloration and low contrast ratio.Type: GrantFiled: April 14, 1993Date of Patent: August 9, 1994Assignees: Seiko Epson Corporation, Fujimori Kogyo Co. Ltd.Inventors: Hiroshi Wada, Shinji Wada, Osamu Okumura, Rinjiro Ichikawa, Kenji Hashimoto, Takashi Yamada
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Patent number: 5142393Abstract: An electro-optical liquid crystal display device includes at least one of the optically anisotropic layers has three main refractive indices N1o, N2o and N3e. The axis corresponding to N3e is in the direction approximately parallel to the surfaces of the substrates of the liquid crystal cell and N3e is smaller than N1o and N2o. The device may include a homogenous or twisted liquid crystall cell with the cell and anisotropic layer sandwiched between two polarizers.Type: GrantFiled: January 19, 1990Date of Patent: August 25, 1992Assignee: Seiko Epson CorporationInventors: Osamu Okumura, Motoyuki Toki, Hirosada Horiguchi
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Patent number: 5139340Abstract: A reflective type liquid crystal display device is achieved with enhanced brightness and contrast ratio utilizing only one polarizing plate or polarizer and a refelctor in combination with a liquid crystal cell wherein the light propagating through the liquid crystal cell to the reflector is substantially of linear polarization. By employing a single polarizer, the effective brightness and contrast of the display can be increased by about 12% and the multi-coloring effect in a monochromatic black/white display can be significantly reduced. To obtain an ideal brightness level, linearly polarized light, which enters the liquid crystal cell through the single polarizer, is required to be transmitted twice through the liquid crystal layer and then passed again through the polarizer under the same conditions as in the case of obtaining linear polarization utilized in the transmissive type mode employing two parallel polarizing plates.Type: GrantFiled: December 7, 1990Date of Patent: August 18, 1992Assignee: Seiko Epson CorporationInventor: Osamu Okumura
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Patent number: 5035489Abstract: An electro-optical device includes at least two adjacent transparent twisted nematic liquid crystal cells, each cell having a twisted nematic liquid crystal with a twist angle greater than 90.degree. between a pair of spaced apart opposed substrates with electrodes selectively disposed thereon. A linear polarizer is disposed on an exterior surface of each of the two cells. One of the two cells includes a plurality of electrodes for selectively producing a desired display. Application of a suitable voltage to the second cell compensates for changes in ambient temperature conditions or undesirable thicknesses in the liquid crystal materials of the two cells to ensure that a monochromatic display having excellent contrast is produced by the device and compensates for elliptically polarized light emitted by the first cell so that the device produces substantially linearly polarized light.Type: GrantFiled: April 27, 1989Date of Patent: July 30, 1991Assignee: Seiko Epson CorporationInventors: Chiyoaki Iijima, Yuzuru Sato, Hiroshi Wada, Osamu Okumura, Satoshi Kamada
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Patent number: 4784982Abstract: Disclosed is a composite body comprising amorphous and porous silica or silica-alumina and a layer of an aluminum-containing phylosilicate formed on surfaces of primary particles of the silica or silica-alumina. This composite phylosilicate is obtained by reacting a water-soluble silicate, a water-soluble zinc salt or magnesium salt and a water-soluble aluminum salt or aluminate in an aqueous medium containing a sol or gel of silica or silica-alumina. This composite phylosilicate has a large specific surface area and a large pore volume and has both the properties of a solid acid and the properties of a solid base.Type: GrantFiled: February 26, 1988Date of Patent: November 15, 1988Assignee: Mizusawa Industrial Chemicals, Ltd.Inventors: Kouichi Usui, Masahide Ogawa, Osamu Okumura, Teiji Sato, Kouichi Yamada, Masanori Tanaka, Noriyuki Takahashi
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Patent number: 4287101Abstract: An enzyme-containing detergent composition having good deterbency against, especially, soiled spots in fabrics or clothes derived from a combination of sebum from human skin, a slight amount of sweat and invisible fine dust in the air is described. This detergent composition contains (I) (a) at least one olefin sulfonate having 10 to 20 carbon atoms, (b) at least one anionic surface active agent having an SO.sub.3 or SO.sub.4 group, except for said olefin sulfonate, and (c) at least one pyrophosphate and (II) at least one enzyme, the total amount of said components (a), (b) and (c) being at least 25% by weight based on the total amount of the detergent composition and the weight ratio of (a):(b):(c) being within the area enclosed by the points A, B, C and D defined in the attached triangular diagram.Type: GrantFiled: March 27, 1980Date of Patent: September 1, 1981Assignee: The Lion Fat & Oil Co., Ltd.Inventors: Hiroshi Nishio, Kazuaki Fukano, Isao Amano, Osamu Okumura
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Patent number: 4239662Abstract: An improved liquid detergent composition having a markedly decreased tendency toward film formation on the liquid surface when exposed to open air, without loss in detergency and foaming power.This includes a magnesium .alpha.-olefinsulfonate, an alcohol-ethylene oxide addition product and magnesium sulfate, all in limited concentrations, the balance being an aqueous solvent and optional additives.Type: GrantFiled: February 15, 1979Date of Patent: December 16, 1980Assignee: The Lion Fat and Oil Co., Ltd.Inventors: Osamu Okumura, Takenobu Sakatani, Toshinobu Kashiwada, Kiyotaka Tokuyama
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Patent number: 4142984Abstract: A process for improving the physical properties of granular detergents comprises making fine particles of calcium sulfite adhere uniformly onto the surface of the granular detergent. The amount of said calcium sulfite particles to be thus applied is in the range of from about 0.5 to about 5 wt.% relative to the granular detergent, and about 70 wt.% or less of this amount may be replaced with fine particles of alumino silicate. The applicable average particle diameter of calcium sulfite to be made to adhere onto granular detergent is less than about 4 .mu. and that of aluminosilicate is less than about 5 .mu..Type: GrantFiled: November 3, 1977Date of Patent: March 6, 1979Assignee: The Lion Fat & Oil Co., Ltd.Inventors: Osamu Okumura, Hiroshi Nishio, Takashi Ikeuchi, Izumi Yamane
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Patent number: 4140657Abstract: A granular detergent composition which comprises a mixture of surface active agents consisting of alkyl sulfate (AS) expressed by the general formula ROSO.sub.3 M (wherein R represents straight chain or branched chain alkyl group having 14 - 15 carbon atoms on the average, and M represents alkali metal or alkaline earth metal), an alkali metal or an alkaline earth metal, .alpha.-olefin sulfonate (AOS) having 12 - 18 carbon atoms and polyoxyethylene alkyl ether sulfate (AES) expressed by the general formula R'O(C.sub.2 H.sub.4 O).sub.n SO.sub.3 M' (wherein R' represents straight chain or branched chain alkyl group having 8 - 12 carbon atoms on the average, n is an integer in the range of 1 - 8, and M' represents an alkali metal or an alkaline earth metal), at a mixing ratio within the hatched area bounded by points a, b, c, d, e and f in the appended drawing, said mixture of surface active agents being present in an amount of 20 - 40 wt.Type: GrantFiled: June 13, 1977Date of Patent: February 20, 1979Assignee: The Lion Fat & Oil Co., Ltd.Inventors: Osamu Okumura, Hiroshi Nishio, Ryuichi Nakagawa, Takashi Ikeuchi
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Patent number: 4028282Abstract: The present invention relates to a method of manufacturing granular detergents having good biodegradability, mildness to the skin, an appropriate breaking strength of the granules, a desired bulk density and a satisfactory free-flowability, by heating a detergent slurry and atomizing it in an ambient or cold atmosphere, wherein the detergent slurry employed is a mixture consisting of 10 to 30 wt.% of olefin sulfonate having 10 to 22 carbon atoms, 60 to 90 wt.% of sodium carbonate, sodium silicate and water and 0 to 30 wt.% of other well-known additives, and the ratio of said sodium carbonate, sodium silicate and water is in a specific range.Type: GrantFiled: May 5, 1976Date of Patent: June 7, 1977Assignee: Lion Fat & Oil Co., Ltd.Inventors: Osamu Okumura, Takenobu Sakatani, Izumi Yamane, Toshinobu Kashiwada
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Patent number: 3974211Abstract: A method of manufacturing methallyl sulfonate, which comprises: forming a sulfur trioxide-dialkyl sulfoxide complex by effecting reaction between sulfur trioxide and dialkyl sulfoxide as mixed at the ratio of more than 0.8 mol of the latter to 1 mol of the former in the presence of an inert solvent; effecting reaction between said complex and isobutylene, in an amount of 0.9-1.2 mols of isobutylene per 1 mol of sulfur trioxide, by applying a temperature in the range of 10.degree.-80.degree.C; and neutralizing the reaction product with a base.Type: GrantFiled: January 8, 1975Date of Patent: August 10, 1976Assignee: Lion Fat & Oil Co., Ltd.Inventors: Osamu Okumura, Katsumi Yaguchi, Ikuo Adachi, Masuzo Nagayama
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Patent number: 3969375Abstract: A neutralized product containing salt of .alpha.-sulfofatty acid ester in high concentration can be produced by the method comprising the steps of (1) sulfonating fatty acid ester by contacting a gaseous mixture of sulfur trioxide (SO.sub.3) and an inert gas containing 1 - 15% by volume of SO.sub.3 with a film of a fatty acid ester, said ester having the formula RCH.sub.2 COOR' (wherein R is alkyl having 8 - 18 carbon atoms and R' is alkyl having 1 - 5 carbon atoms), under the conditions that the molar ratio of SO.sub.3 to said fatty acid ester is in the range of 1.0 - 1.5, the temperature is in the range of 50.degree. - 85.degree.C and the time of contact is in the range of 0.5 - 30 seconds; (2) contacting a film of the reaction product obtained by step (1) into contact with said gaseous mixture, under the conditions of a temperature in the range of 95 - 150.degree.Type: GrantFiled: November 18, 1974Date of Patent: July 13, 1976Assignee: Lion Fat & Oil Co., Ltd.Inventors: Osamu Okumura, Takenobu Sakatani, Kazuo Ohbu, Masuzo Nagayama
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Patent number: 3951877Abstract: A heavy-duty granular detergent composition consisting of 10 to 60 wt. percent of sodium citrate, 5 to 40 wt. percent of non-soap anionic surfactants, 0.1 to 10 wt. percent of inorganic aluminum salts and additives for use in conventional detergents, the weight ratio of the citrate to the surfactants being 1/5 to 10/1.Type: GrantFiled: July 13, 1973Date of Patent: April 20, 1976Assignee: Lion Fat & Oil Co., Ltd.Inventors: Osamu Okumura, Kazuo Ohbu, Mitsuharu Kachi, Masuzo Nagayama
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Patent number: RE35799Abstract: A reflection-type liquid crystal (LC) device having a twisted nematic (TN) LC layer that lets linearly-polarized incident light enter and become circularly-polarized at a reflecting surface, and then linearly polarizes it, after reflecting, with a plane of polarization that has been rotated 90.degree. from the incident light at an light output surface. The TN LC layer allows linearly-polarized incident light to enter at an angle to the molecular plane of light input of the twisted nematic LC, and to linearly polarize the light after reflection. The plane of polarization is rotated 90.degree. from the incident light at the light output surface. The TN LC layer also allows circularly-polarized incident light to enter and become linearly-polarized light at the reflecting surface. Circularly-polarized light after reflection may be rotated opposite the incident circularly-polarized light at the light output surface to provide for reverse on/off states.Type: GrantFiled: October 15, 1996Date of Patent: May 19, 1998Assignee: Seiko Epson CorporationInventors: Tomio Sonehara, Osamu Okumura