Patents by Inventor Yasuhiro Hirano
Yasuhiro Hirano 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: 5780145Abstract: A molding resin composition containing, in a resin, a filler comprising a globular powder of which mean particle diameter is not smaller than 0.1 .mu.m and not greater than 1.5 .mu.m (x component), a globular powder of which mean particle diameter is not smaller than 2 .mu.m and not greater than 15 .mu.m (y component) and a globular powder of which mean particle diameter is not smaller than 20 .mu.m and not greater than 70 .mu.m (z component), wherein proportions of the x, y and z components based on the total volume of x, y and z components are not smaller than 10% by volume and not greater than 24% by volume, not smaller than 0.1% by volume and not greater than 36% by volume and not smaller than 57% by volume and not greater than 76% by volume, exhibits an excellent fluidity even when loaded with a high percentage of filler. Further, their cured products are lowered in the moisture absorption and thermal expansion coefficient of which increases result from the resin itself present in the cured product.Type: GrantFiled: June 30, 1997Date of Patent: July 14, 1998Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuhiro Hirano, Masatsugu Akiba, Yutaka Shiomi, Noriaki Saito
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Patent number: 5750789Abstract: An unsaturated imide compound represented by formula (1): ##STR1## wherein Q is an alicyclic structure-containing hydrocarbon group having 4-20 carbon atoms; each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.i and R.sub.j represents a hydrogen atom, a halogen atom, a hydrocarbon group having 1-6 carbon atoms or a halogen-containing hydrocarbon group having 1-6 carbon atoms; each of a, b, c, d, e and f represents an integer of 0 to 4 satisfying a+b.ltoreq.4, c+d.ltoreq.4 and e+f.ltoreq.4 and D represents a divalent organic group having 2-24 carbon atoms and an ethylenically unsaturated double bond, a process for producing the unsaturated imide compound of formula (1) and intermediates for producing the unsaturated imide compound of formula (1). The unsaturated imide compound of formula (1) is well soluble in organic solvents and can give cured products excellent in heat resistance, low water absorption and flexibility.Type: GrantFiled: September 29, 1995Date of Patent: May 12, 1998Assignee: Sumitomo Chemical Company LimitedInventors: Yasuhiro Hirano, Yasuhiro Endo, Kazuo Takebe, Mitsuhiro Shibata, Shuichi Kanagawa, Yutaka Shiomi, Masatsugu Akiba, Shinichiro Kitayama
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Patent number: 5719225Abstract: A molding resin composition containing, in a resin, a filler comprising a globular powder of which mean particle diameter is not smaller than 0.1 .mu.m and not greater than 1.5 .mu.m (x component), a globular powder of which mean particle diameter is not smaller than 2 .mu.m and not greater than 15 .mu.m (y component) and a globular powder of which mean particle diameter is not smaller than 20 .mu.m and not greater than 70 .mu.m (z component), wherein proportions of the x, y and z components based on the total volume of x, y and z components are not smaller than 10% by volume and not greater than 24% by volume, not smaller than 0.1% by volume and not greater than 36% by volume and not smaller than 57% by volume and not greater than 76% by volume, exhibits an excellent fluidity even when loaded with a high percentage of filler. Further, their cured products are lowered in the moisture absorption and thermal expansion coefficient of which increases result from the resin itself present in the cured product.Type: GrantFiled: June 7, 1995Date of Patent: February 17, 1998Assignee: Sumitomo Chemical Company, Ltd.Inventors: Yasuhiro Hirano, Masatsugu Akiba, Yutaka Shiomi, Noriaki Saito
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Patent number: 5705596Abstract: The invention provides a cis-stilbene type epoxy resin having lower melting point and lower viscosity than the trans-stilbene type epoxy resin hitherto known. The stilbene type epoxy resin has a cis-isomer content of essentially 100%, or in the alternative, at least about 10% with the rest being the trans-isomer, and is based on the following general formula (1): ##STR1## wherein R.sub.1 to R.sub.8 are independently an acyclic or cyclic alkyl group, a hydrogen atom, or a halogen atom. Production processes for these epoxy resins are also disclosed.Type: GrantFiled: June 3, 1996Date of Patent: January 6, 1998Assignee: Sumitomo Chemical Company, LimitedInventors: Akira Yokota, Yasuhiro Hirano, Masatsugu Akiba, Hiroshi Nakamura, Shigeki Naitoh
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Patent number: 5498687Abstract: An unsaturated imide compound represented by formula (1): ##STR1## wherein Q is an alicyclic structure-containing hydrocarbon group having 4-20 carbon atoms; each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.i and R.sub.j represents a hydrogen atom, a halogen atom, a hydrocarbon group having 1-6 carbon atoms or a halogen-containing hydrocarbon group having 1-6 carbon atoms; each of a, b, c, d, e and f represents an integer of 0 to 4 satisfying a+b.ltoreq.4, c+d.ltoreq.4 and e+f.ltoreq.4 and D represents a divalent organic group having 2-24 carbon atoms and an ethylenically unsaturated double bond, a process for producing the unsaturated imide compound of formula (1) and intermediates for producing the unsaturated imide compound of formula (1). The unsaturated imide compound of formula (1) is well soluble in organic solvents and can give cured products excellent in heat resistance, low water absorption and flexibility.Type: GrantFiled: March 28, 1995Date of Patent: March 12, 1996Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuhiro Hirano, Yasuhiro Endo, Kazuo Takebe, Mitsuhiro Shibata, Shuichi Kanagawa, Yutaka Shiomi, Masatsugu Akiba, Shinichiro Kitayama
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Patent number: 5444165Abstract: An unsaturated imide compound represented by formula (1): ##STR1## wherein Q is an alicyclic structure-containing hydrocarbon group having 4-20 carbon atoms; each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.i and R.sub.j represents a hydrogen atom, a halogen atom, a hydrocarbon group having 1-6 carbon atoms or a halogen-containing hydrocarbon group having 1-6 carbon atoms; each of a, b, c, d, e and f represents an integer of 0 to 4 satisfying a+b.ltoreq.4, c+d.ltoreq.4 and e+f.ltoreq.4 and D represents a divalent organic group having 2-24 carbon atoms and an ethylenically unsaturated double bond, a process for producing the unsaturated imide compound of formula (1) and intermediates for producing the unsaturated imide compound of formula (1). The unsaturated imide compound of formula (1) is well soluble in organic solvents and can give cured products excellent in heat resistance, low water absorption and flexibility.Type: GrantFiled: February 25, 1994Date of Patent: August 22, 1995Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuhiro Hirano, Yasuhiro Endo, Kazuo Takebe, Mitsuhiro Shibata, Shuichi Kanagawa, Yutaka Shiomi, Masatsugu Akiba, Shinichiro Kitayama
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Patent number: 5329047Abstract: A thermosetting resin composition useful for a copper-clad laminate is provided, which comprise (A) an aromatic diamine compound represented by the following formula: ##STR1## wherein Ar is a divalent aromatic residue, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each is an allyl group or a hydrogen atom but at least one of them is an allyl group, and (B) a polymaleimide compound having two or more maleimide groups in a molecule thereof.Type: GrantFiled: December 13, 1991Date of Patent: July 12, 1994Assignee: Sumitomo Chemical Co., Ltd.Inventors: Shigeki Naitoh, Yasuhisa Saito, Yasuhiro Hirano, Kazuo Takebe, Kunimasa Kamio, Youichi Ueda
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Patent number: 5326881Abstract: An unsaturated imide compound represented by formula (1): ##STR1## wherein Q is an alicyclic structure-containing hydrocarbon group having 4-20 carbon atoms; each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.i and R.sub.j represents a hydrogen atom, a halogen atom, a hydrocarbon group having 1-6 carbon atoms or a halogen-containing hydrocarbon group having 1-6 carbon atoms; each of a, b, c, d, e and f represents an integer of 0 to 4 satisfying a+b.ltoreq.4, c+d.ltoreq.4 and e+f.ltoreq.4 and D represents a divalent organic group having 2-24 carbon atoms and an ethylenically unsaturated double bond, a process for producing the unsaturated imide compound of formula (1) and intermediates for producing the unsaturated imide compound of formula (1). The unsaturated imide compound of formula (1) is well soluble in organic solvents and can give cured products excellent in heat resistance, low water absorption and flexibility.Type: GrantFiled: October 28, 1993Date of Patent: July 5, 1994Assignee: Sumitomo Chemical Company Ltd.Inventors: Yasuhiro Hirano, Yasuhiro Endo, Kazuo Takebe, Mitsuhiro Shibata, Shuichi Kanagawa, Yutaka Shiomi, Masatsugu Akiba, Shinichiro Kitayama
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Patent number: 5252687Abstract: A thermosetting resin composition is provide, which contains a compound of ##STR1## wherein substituents R.sub.1 -R.sub.6 each represents a hydrogen atom or a saturated alkyl group having 1-6 carbon atoms, substituents R.sup.7 -R.sup.12 each represents a hydrogen atom, a saturated alkyl group having 1-4 carbon atoms or an alkoxy group having 1-4 carbon atoms, X.sub.a -X.sub.e each represents a hydrogen atom, a chlorine atom or a bromine atome, and the average repeating unit number n denotes a numeral from 0 to 5, and a polyamide compound having two or more maleimide groups and, if desired, a compound of ##STR2## wherein R.sub.1 and R.sub.2 each represents a methyl group or a phenyl group, and R.sub.3 represents a hydrogen atom or a functional group containing an amino group, a glycidyl group or an alicylic epoxy group, l denotes a numeral in the range of 0-500, and m denotes a numeral in the range of 1-500, or ##STR3## wherein R.sub.1 and R.sub.2 each represents a methyl group or a phenyl group, and R.sub.Type: GrantFiled: March 29, 1991Date of Patent: October 12, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Yutaka Shiomi, Shigeki Naitoh, Yasuhiro Hirano, Kazuo Takebe
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Patent number: 5109087Abstract: A thermosetting resin composition useful for a copper-clad laminate is provided, which comprise (A) an aromatic diamine compound represented by the following formula: ##STR1## wherein Ar is a divalent aromatic residue, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each is an allyl group or a hydrogen atom but at least one of them is an allyl group, and (B) a polymaleimide compound having two or more maleimide groups in a molecule thereof.Type: GrantFiled: January 12, 1990Date of Patent: April 28, 1992Assignee: Sumitomo Chemical Company, LimitedInventors: Shigeki Naitoh, Yasuhisa Saito, Yasuhiro Hirano, Kazuo Takebe, Kunimasa Kamio, Youichi Ueda
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Patent number: 5021724Abstract: A controlling apparatus for an induction motor for controlling the induction motor in high efficiency having a converter for supplying an electric power to the induction motor, a rotational speed detector of the induction motor, a controlling means of the converter for holding a torque of the induction motor constant while the rotational speed of the induction motor is lower than a base rotational speed and to decrease a secondary magnetic flux of the induction motor according to the rotational speed while the rotational speed of the induction motor is over the base rotational speed, and a means for varying the secondary magnetic flux according to a terminal voltage of the induction motor so as to hold the terminal voltage a predetermined constant voltage while the rotational speed of the induction motor is higher than the predetermined speed.Type: GrantFiled: November 7, 1990Date of Patent: June 4, 1991Assignee: Hitachi, Ltd.Inventors: Yasuhiro Hirano, Mitunori Yamashina, Tetsuo Etoh
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Patent number: 4885631Abstract: A television signal transmission system having an improved receiver which system is capable of transmitting a wide-band television video signal in a frequency band narrower than the frequency band of the television video signal is a multiplex video signal and the receiver reproduces a luminance signal and color signal from the multiplexed video signal. The receiver includes a motion detector for detecting motion information of a picture from the multiplex video signal and a separator for separating signals in response to the detected motion information to thereby form a picture of high quality utilizing the motion information.Type: GrantFiled: August 19, 1988Date of Patent: December 5, 1989Assignee: Hitachi, Ltd.Inventors: Takahiko Fukinuki, Yasuhiro Hirano, Hiroshi Yoshigi, Hidehiko Jusa
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Patent number: 4745458Abstract: In a color television signal processing system for converting a scanning signal sequentially scanned in the transmitting side into an interlace-scanned television signal in order to obtain a high-quality color television picture, said system is arranged to detect information related to picture motion and that concerning to a spatio-temporal frequency characteristic and to control a characteristic of a spatio-temporal filter for transmitting a luminance signal on the basis of this information and to transmit the signal expressing the information multiplied with the color television signal.Type: GrantFiled: November 19, 1985Date of Patent: May 17, 1988Assignee: Hitachi, Ltd.Inventors: Yasuhiro Hirano, Hiroshi Yoshigi, Takahiko Fukinuki, Hidehiko Jusa
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Patent number: 4409627Abstract: In order to prevent deterioration of a reproduced picture quality due to lack of the clock signals, a video signal decoding circuit produces quasi-code signals when the lack of clock signal is detected.Type: GrantFiled: September 5, 1980Date of Patent: October 11, 1983Assignee: Hitachi Denshi Kabushiki KaishaInventors: Yoshizumi Eto, Yasuhiro Hirano
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Patent number: 4367495Abstract: Magnetic recording and reproducing method and apparatus for digital signals. An input binary digital signal is converted into an intermediate signal series by a precoder having a delay circuit for two-time slot delay and a modulo-2 adder. The intermediate signal series is branched to two paths. One signal on one path is delayed by one time slot and subtracted from the other signal on the other path to produce a recording signal to be recorded on a recording medium. A signal reproduced from the recording medium is branched to two paths. One signal on one path is delayed by one time slot and added to the other signal on the other path. The added signal is decoded to produce a binary signal which corresponds to the input binary digital signal.Type: GrantFiled: October 16, 1980Date of Patent: January 4, 1983Assignee: Hitachi Denshi Kabushiki KaishaInventors: Seiichi Mita, Yasuhiro Hirano, Yoshizumi Eto