Patents by Inventor Takuji Itoh
Takuji Itoh 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: 5912505Abstract: A semiconductor package and a semiconductor device comprises a metal bump to be placed between a metal pad formed on a package body of a substantially plate-like shape and an interconnecting solder for connecting a metal ball thereto, wherein the melting point of the metal bump is higher than that of the interconnecting solder, thereby enhancing a fatigue resistance against temperature fluctuations as well as improving a reliability around the interconnecting portion.Type: GrantFiled: November 4, 1996Date of Patent: June 15, 1999Assignee: Sumitomo Metal (SMI) Electronics Devices, Inc.Inventors: Takuji Itoh, Toshihiko Kubo
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Patent number: 5375069Abstract: A wiring processing method for determining a wiring route for connecting terminals includes a step of dividing a wirable region into a plurality of rectangular regions in a virtual region corresponding to a chip, a step of searching a rectangular region for connecting the terminals to be wired by tracing mutually crossings rectangular regions, and a step of determining a detailed wiring route inside the searched rectangular region. Since the search is conducted by use of the rectangular region as a unit, high speed search can be made.Type: GrantFiled: January 21, 1994Date of Patent: December 20, 1994Assignee: Hitachi, Ltd.Inventors: Yasuo Satoh, Takuji Itoh
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Patent number: 5094993Abstract: Disclosed is a catalyst suitable for hydrotreating hydrocarbonaceous oils which catalyst is comprised of at least one hydrogenative-active metal component supported on a carrier material comprised of about 20 to 60 weight percent of amorphous silica-alumina and about 80 to 40 weight percent of crystalline alumina having an average crystallite size of 35 .ANG., or less.Type: GrantFiled: October 1, 1990Date of Patent: March 10, 1992Assignee: Tonen CorporationInventors: Tadashi Miura, Ikuo Akizuki, Hiroshi Kaya, Shohei Okano, Takuji Itoh
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Patent number: 4959338Abstract: The present invention relates to a heat-resistant catalyst carrier and a catalyst carrier molding comprising silica and alumina, in which a silica content is in a range of 2% by weight to 30% by weight, and an overall pore volume is at least 0.3 ml/g and a volume of pores having a diameter of 100 .ANG. or larger accounts for at least 60% of the overall pore volume, or which have a specific surface area of at least 20 m.sup.2 /g after firing at 1200.degree. C. in air, or which show a peak area at -110 ppm to -130 ppm which is 0 to 10% with respect to a peak area at -50 ppm to -130 ppm, as measured by the nuclear magnetic resonance (.sup.29 Si-NMR) method using silicone rubber (-21.9 ppm) as a reference peak after firing at 500.degree. C. in air, and is also concerned with a catalyst for combustion comprising the same.Type: GrantFiled: November 30, 1988Date of Patent: September 25, 1990Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Tadashi Miura, Takuji Itoh, Masaaki Kadono, Masakichi Shimada
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Patent number: 4849311Abstract: Disclosed are immobilized electrolyte membranes having a high electric conductivity and a high mechanical strength, where an ionic conductor such as a polymer electrolyte or an ion-exchange resin is immobilized in pores of a porous solid polymer membrane, particularly of polyolefin having a weight average molecular weight of not less than 5.times.10.sup.5, the porous solid polymer membrane having a thickness of 0.1 .mu.m to 50 .mu.m, a porosity of 40% to 90%, a tensile strength of not less than 200 kg/cm.sup.2, and an average permeable pore diameter of 0.001 .mu.m to 0.1 .mu.m.Type: GrantFiled: September 22, 1988Date of Patent: July 18, 1989Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Kazuo Saeki, Koichi Kono
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Patent number: 4840778Abstract: Novel primarily chain inorganic polysilazanes of average molecular weight of 690 to 2000 are prepared from novel adducts of a halosilane and a base by reacting the adducts with ammonia in unreactive solvents. Silicon nitride is prepared by heating the polysilazanes at 1000.degree. to 1600.degree. C., preferably below 1300.degree. C., most preferably 1000.degree. to 1100.degree. C.Type: GrantFiled: November 26, 1985Date of Patent: June 20, 1989Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Mikiro Arai, Takeshi Isoda, Takuji Itoh
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Patent number: 4497909Abstract: Novel catalyst compositions are provided comprising a silica/alumina carrier having a silica content less than about 40% by weight and at least one noble metal component of Group VIII of the Periodic Table and wherein the catalyst contains (1) pores having a diameter of smaller than 600 .ANG. occupying at least 90% of the total pore volume and (2) pores having a diameter of 150 to 600 .ANG. occupying at least about 40% of the total volume of the pores having a diameter of smaller than 600 .ANG.. This catalyst is particularly useful in the production of jet fuels and white oils.Type: GrantFiled: August 6, 1981Date of Patent: February 5, 1985Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Ikuo Akitsuki
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Patent number: 4218308Abstract: Novel catalyst compositions are provided comprising a silica/alumina carrier having a silica content less than about 40% by weight and at least one noble metal component of Group VIII of the Periodic Table and wherein the catalyst contains (1) pores having a diameter of smaller than 600 A occupying at least 90% of the total pore volume and (2) pores having a diameter of 150 to 600 A occupying at least about 40% of the total volume of the pores having a diameter of smaller than 600 A. This catalyst is particularly useful in the production of jet fuels and white oils.Type: GrantFiled: January 29, 1979Date of Patent: August 19, 1980Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Ikuo Akitsuki
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Patent number: 4199555Abstract: Nitrogen oxides are removed from gaseous mixtures comprising the same by contacting with a catalyst comprising a base metal component carried on a silica-alumina base in the presence of ammonia.Type: GrantFiled: August 23, 1978Date of Patent: April 22, 1980Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Satoshi Sakurada, Nobuaki Tagaya
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Patent number: 4186078Abstract: A catalyst and process are described for hydrofining petroleum wax comprising contacting the wax with hydrogen in the presence of a catalyst comprising at least one metal hydrogenating component on a porous alumina/silica carrier containing from about 0.2 to 5 wt.% of an alkali metal component, the catalyst having a specific surface area of about 200 to 300 m.sup.2 /g and being further characterized in that (a) the volume of pores having a diameter in the range of 60 to 150 A is greater than 80% of the volume of pores having a diameter in the range of 0 to 150 A and (b) the volume of pores having a diameter in the range of 0 to 600 A is in the range of about 0.45 to 0.60 ml/g.Type: GrantFiled: April 20, 1978Date of Patent: January 29, 1980Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Satoshi Sakurada, Shohei Okano, Takashi Obayashi, Takeo Toyoizumi, Osami Iwata
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Patent number: 4139494Abstract: A catalyst and process are described for hydrofining petroleum wax comprising contacting the wax with hydrogen in the presence of a catalyst comprising at least one metal hydrogenating component on a porous alumina/silica carrier containing from about 0.2 to 5 wt.% of an alkali metal component, the catalyst having a specific surface area of about 200 to 300 m.sup.2 /g and being further characterized in that (a) the volume of pores having a diameter in the range of 60 to 150 A is greater than 80% of the volume of pores having a diameter in the range of 0 to 150 A and (b) the volume of pores having a diameter in the range of 0 to 600 A is in the range of about 0.45 to 0.60 ml/g.Type: GrantFiled: September 12, 1977Date of Patent: February 13, 1979Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Satoshi Sakurada, Shohei Okano, Takashi Obayashi, Takeo Toyoizumi, Osami Iwata
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Patent number: 4134856Abstract: A hydro-refining catalyst comprising at least one hydrogenation metal component supported on an alumina or alumina-containing carrier containing from about 5 to about 25 wt. % silica, said catalyst having a specific surface area in the range of from about 250 to about 300 m.sup.2 /g and a pore volume distribution characterized in that (1) the volume of pores having a diameter of 60 to 150 A is at least about 80% of the volume of pores having a diameter of 0 to 150 A, (2) the volume of pores having a diameter of 150 to 300 A is less than about 20% of the volume of pores of 0 to 300 A, (3) the volume of pores having a diameter of 150 to 2,000 A is less than about 0.01 ml/g, (4) the volume of pores having a diameter of 0 to 600 A is in the range of from about 0.45 to about 0.60 ml/g. The catalyst is used in the hydro-refining of heavy hydrocarbon oils containing sulfur, nitrogen and metal contaminants.Type: GrantFiled: December 3, 1976Date of Patent: January 16, 1979Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Satoshi Sakurada, Shohei Okano, Takashi Obayashi
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Patent number: 4124536Abstract: Nitrogen oxides are removed from gaseous mixtures comprising the same by contacting with a catalyst comprising a base metal component carried on a silica-alumina base in the presence of ammonia.Type: GrantFiled: July 13, 1976Date of Patent: November 7, 1978Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Satoshi Sakurada, Nobuaki Tagaya
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Patent number: 4104361Abstract: Nitrogen oxides are removed from gaseous mixtures comprising the same by contacting with a catalyst comprising a base metal component carried on a natural or synthetic zeolite in the presence of ammonia. The alkali metal content of the zeolite is carefully controlled through ion exchange with an alkaline earth metal compound.Type: GrantFiled: April 6, 1977Date of Patent: August 1, 1978Assignee: Exxon Research & Engineering Co.Inventors: Eiichiroh Nishikawa, Takuji Itoh, Tsugio Maeshima, Setsuo Kamiyama
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Patent number: 4052337Abstract: Nitrogen oxides are removed from gaseous mixtures comprising the same by contacting with a catalyst comprising a base metal component carried on a natural or synthetic zeolite in the presence of ammonia. The alkali metal content of the zeolite is carefully controlled through ion exchange with an alkaline earth metal compound.Type: GrantFiled: March 19, 1976Date of Patent: October 4, 1977Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Eiichiroh Nishikawa, Takuji Itoh, Tsugio Maeshima, Setsuo Kamiyama
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Patent number: 4049581Abstract: Improved distribution of the tin component of a hydrocarbon conversion catalyst also containing a Group VIII noble metal and halogen on a carrier is obtained by impregnation of the carrier with a solution of an acid amide or derivatives thereof and a soluble tin compound.Type: GrantFiled: March 25, 1975Date of Patent: September 20, 1977Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Eiichiroh Nishikawa, Tadashi Miura, Takashi Yamahata
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Patent number: 4020011Abstract: Improved distribution of the tin component of a hydrocarbon conversion catalyst also containing a Group VIII noble metal and halogen on a refractory carrier is obtained by impregnation of the carrier with a solution comprising an organic solvent containing a hydrogen halide and a soluble compound of tin.Type: GrantFiled: April 10, 1975Date of Patent: April 26, 1977Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Eiichiroh Nishikawa, Takuji Itoh, Tadashi Miura
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Patent number: 4016241Abstract: Nitrogen oxides are removed from gas mixtures containing nitrogen oxides and oxygen by adding a reducing agent that is a C.sub.2 to C.sub.6 olefin or an aromatic hydrocarbon such as benzene or toluene, preferably butene-1, and contacting the mixture at 200.degree. to 450.degree. C with a catalyst comprising iridium or a compound thereof supported on a refractory carrier, preferably alumina.Type: GrantFiled: September 16, 1975Date of Patent: April 5, 1977Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Eiichiroh Nishikawa, Takuji Itoh, Setsuo Kamiyama
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Patent number: 4008149Abstract: A hydro-refining catalyst comprising at least one hydrogenation metal component supported on an alumina or alumina-containing carrier containing from about 5 to about 25 wt. % silica, said catalyst having a specific surface area in the range of from about 250 to about 300 m.sup.2 /g and a pore volume distribution characterized in that (1) the volume of pores having a diameter of 60 to 150 A is at least about 80% of the volume of pores having a diameter of 0 to 150 A, (2) the volume of pores having a diameter of 150 to 300 A is less than about 20% of the volume of pores of 0 to 300 A, (3) the volume of pores having a diameter of 150 to 2,000 A is less than about 0.01 ml/g, (4) the volume of pores having a diameter of 0 to 600 A is in the range of from about 0.45 to about 0.60 ml/g. The catalyst is used in the hydro-refining of heavy hydrocarbon oils containing sulfur, nitrogen and metal contaminants.Type: GrantFiled: March 19, 1976Date of Patent: February 15, 1977Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Satoshi Sakurada, Shohei Okano, Takashi Obayashi
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Patent number: RE29198Abstract: Supported platinum group metal-tin hydrocarbon conversion catalysts are prepared by (1) impregnating a refractory inorganic oxide support with an aqueous solution of a halogen acid containing a platinum group metal component; (2) drying the platinum group metal impregnated carrier; (3) impregnating the dried platinum group metal impregnate with a solution of a divalent tin compound in a non-oxidizing and non-reducing atmosphere; and (4) drying the resulting impregnate.Type: GrantFiled: May 3, 1976Date of Patent: May 3, 1977Assignee: Toa Nenry Kogyo Kabushiki KaishaInventors: Takuji Itoh, Ikuo Akitsuki