Patents by Inventor Hitoshi Arai
Hitoshi Arai 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: 20020012780Abstract: The subject matter of the invention is a base sheet for the preparation of a flexible printed circuit board which is a three-layered laminate consisting of (a) an electrically insulating film of a plastic resin such as a polyimide, (b) an epoxy resin-based adhesive layer and (c) a copper foil bonded to the film (a) with intervention of the adhesive layer (b). The base sheet can exhibit excellent performance in respect of peeling resistance, soldering heat resistance, dimensional stability and solvent resistance as well as workability into a printed circuit board only when each of the layers (a), (b) and (c) has a specified thickness in a narrow range of 10-30 &mgr;m, 5-15 &mgr;m and 5-15 &mgr;m, respectively.Type: ApplicationFiled: July 2, 2001Publication date: January 31, 2002Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Masahiro Yuyama, Hitoshi Arai, Yoshitsugu Eguchi
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Publication number: 20010018122Abstract: Disclosed is an improved epoxy resin-based adhesive composition, which is particularly suitable for use in the preparation of a base sheet for flexible printed circuit boards as a laminate of an insulating plastic resin film and a foil of a metal such as copper as well as in the preparation of a coverlay film for protection of the circuit pattern of the metal foil in a flexible printed circuit board. The adhesive composition comprises, as a uniform blend, (a) an epoxy resin, (b) an acrylic rubber modified by carboxyl groups to have a specified content of the carboxyl groups, (c) a curing agent for the epoxy resin such as an aromatic amine compound and (d) a curing promoter, each in a specified weight proportion.Type: ApplicationFiled: January 17, 2001Publication date: August 30, 2001Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Masahiro Yuyama, Hitoshi Arai, Yoshitsugu Eguchi
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Patent number: 6143409Abstract: Described is an adhesive containing a polycarbodiimide resin having repeating units represented by the following formula:.paren open-st.R--N.dbd.C.dbd.N.paren close-st..sub.nwherein R is a divalent hydrocarbon group and n is an integer of 5 to 250, and also described is a flexible printed circuit board and a coverlay film fabricated using the above-described polycarbodiimide resin-containing adhesive.Type: GrantFiled: November 25, 1998Date of Patent: November 7, 2000Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yasuyoshi Komoto, Akira Hayashida, Michio Aizawa, Hitoshi Arai, Ken Yahata
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Patent number: 6080771Abstract: DC107 derivatives represented by formula (I) or pharmaceutically acceptable salts thereof which have antimicrobial activity and antitumor activity are provided: ##STR1## wherein R.sup.1 represents CO(CR.sup.4A R.sup.4B).sub.n1 (O(CH.sub.2).sub.p1).sub.n2 OR.sup.5 {wherein n1 represents an integer of 1 or 2; R.sup.4A and R.sup.4B are the same or different, and each represents hydrogen or lower alkyl; p1 and n2 each represents an integer of 1 to 10; and R.sup.Type: GrantFiled: August 13, 1998Date of Patent: June 27, 2000Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Yutaka Kanda, Hitoshi Arai, Hiroyuki Yamaguchi, Tadashi Ashizawa, Shun-ichi Ikeda, Chikara Murakata, Tatsuya Tamaoki
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Patent number: 6054509Abstract: Provided by the invention is a thermosetting adhesive composition suitable for use in the preparation of metal foil-laminated base sheets of flexible printed circuit boards and laminated product related thereto such as coverlay films and bonding sheets. The adhesive composition is a uniform blend which comprises: (A) an epoxy resin including a brominated epoxy resin to exhibit flame retardancy; (B) a combination of two or three kinds of different nitrile rubbers distinguishable relative to the iodine value and content of carboxyl groups at the molecular chain ends in a specified weight proportion; (C) a curing agent for the epoxy resin; and (D) a curing accelerator, with optional admixture of (E) an inorganic filler; and/or (F) a vulcanizing agent for the nitrile rubbers.Type: GrantFiled: July 13, 1998Date of Patent: April 25, 2000Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hitoshi Arai, Masahiro Yuyama, Yoshitsugu Eguchi
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Patent number: 6020094Abstract: In a method for forming a duplicate image by reading an original image from an original sheet and forming a duplicate image according to the original image, to allow the designation of a number of regions for forming duplicate regional images, from an overall image, with desired color separation or other various attributes to be carried out accurately, promptly and simply by mounting the original sheet only once on a digitizer or the like without regard to the number of processes of forming a duplicate image, a plurality of regions designated on a single original sheet are stored in a storage device such as computer memory, either the designated region stored in the storage device or the region other than the designated region is defined as an effective region, a duplicate image of only the effective region is formed for a first process of forming a duplicate image, only the region other than the effective region for the first process of forming a duplicate image is defined as a new effective region, and a duType: GrantFiled: February 24, 1997Date of Patent: February 1, 2000Assignee: Riso Kagaku CorporationInventors: Hitoshi Arai, Tohru Hibara, Ryuuichi Tsukamoto, Kouichiro Iida
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Patent number: 5981558Abstract: DC107 derivatives represented by formula (I) or pharmaceutically acceptable salts thereof which have antimicrobial activity and antitumor activity are provided: ##STR1## wherein R.sup.1 represents hydrogen, lower alkoxyalkyl, aralkyloxyalkyl, lower alkoxyalkoxyalkyl, lower alkoxyalkoxyalkoxyalkyl, aralkyl, tetrahydropyranyl, COR.sup.4, or the like; R.sup.2 represents hydrogen or COR.sup.6 ; R.sup.3 represents --CH.sub.2 OCOR.sup.7, phthalimidomethyl, or the like; and W represents oxygen or NR.sup.8 (wherein R.sup.8 represents hydroxy, lower alkoxy, lower alkenyloxy, aralkyloxy, substituted or unsubstituted arylsulfonylamino, or lower alkoxycarbonylamino).Type: GrantFiled: August 13, 1998Date of Patent: November 9, 1999Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Hitoshi Arai, Yutaka Kanda, Hiroyuki Yamaguchi, Tadashi Ashizawa, Chikara Murakata, Shun-ichi Ikeda, Tatsuya Tamaoki
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Patent number: 5916675Abstract: Described is an adhesive containing a polycarbodiimide resin having repeating units represented by the following formula:.paren open-st.R--N.dbd.C.dbd.N.paren close-st..sub.nwherein R is a divalent hydrocarbon group and n is an integer of 5 to 250, and also described is a flexible printed circuit board and a coverlay film fabricated using the above-described polycarbodiimide resin-containing adhesive.Type: GrantFiled: June 12, 1997Date of Patent: June 29, 1999Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yasuyoshi Komoto, Akira Hayashida, Michio Aizawa, Hitoshi Arai, Ken Yahata
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Patent number: 5589297Abstract: A lithium secondary cell includes a negative electrode, a positive electrode, and a non-aqueous lithium-containing electrolyte solution. The negative and/or positive electrode includes a current collector, an underlying layer, and an electrode layer. The underlying layer is formed of a thermoset composition comprising carbon black, a thermosetting fluorinated polymer, and a crosslinking agent or a radiation-cured composition comprising carbon black, a radiation-curable polymer, and optionally a radiation-curable compound. The underlying layer is effective for maintaining firm adhesion between the current collector and the electrode layer during repetitive charge/discharge cycles.Type: GrantFiled: December 29, 1994Date of Patent: December 31, 1996Assignee: TDK CorporationInventors: Keiji Koga, Hitoshi Arai, Tsuneo Kagotani, Yousuke Miyaki
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Patent number: 5565284Abstract: A main object of the invention is to provide a lithium secondary cell which experiences minimal capacity deterioration upon repetitive charge-discharge cycles.The lithium secondary cell of the invention is characterized in that a negative and/or positive electrode material is bonded to a current collector surface by a binder containing a crosslinked polymer or formed by coating to a current collector a composition comprising an active material and a polymer binder containing a fluorinated polymer which is curable upon exposure to radiation, followed by radiation curing treatment.Type: GrantFiled: August 4, 1994Date of Patent: October 15, 1996Assignee: TDK CorporationInventors: Keiji Koga, Hisashi Suzuki, Masanori Kaya, Hitoshi Arai, Tsuneo Kagotani, Yousuke Miyaki
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Patent number: 5540085Abstract: A method for detecting a leakage position in an impervious sheet, which comprises disposing a first and a second electrode units on an upper side and a lower side of the impervious sheet, respectively, the first electrode unit intersecting with the second electrode unit; short-circuiting all of electrodes in the first electrode unit; selecting a plurality of electrode sets one set after another set in the second electrode unit, each set comprising three electrodes adjacent to each other; supplying an AC voltage from an AC power source across a central one of each electrode set and the short circuited electrodes of the first electrode unit; measuring a potential difference between the other electrodes in the each electrode set to produce a measured voltage signal; and phase-detecting the measured voltage signal with a signal synchronized with the AC voltage from the AC power source to produce a detected signal, a series of the detected signals produced one after another changing in polarity due to a damage exiType: GrantFiled: November 29, 1994Date of Patent: July 30, 1996Assignees: Sakata Denki Co., Ltd, Maeda CorporationInventors: Fumio Sakata, Nobuyoshi Yamazaki, Masaichiro Hatano, Hitoshi Arai, Ken Arai, Masanobu Furukawa
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Patent number: 5502384Abstract: In an image reconstruction method in a nuclear magnetic resonance imaging apparatus, the method comprises first and second steps to get detected data S.sub.I for at least about half of region inclusive of an origin and data S.sub.IV in a region symmetric with respect to a line passing through an origin on one of axes from the detected region in the acquired data space and parallel to the other axis, respectively, third and fourth steps to perform inverse Fourier transform on the data S.sub.I and S.sub.Type: GrantFiled: May 17, 1994Date of Patent: March 26, 1996Assignees: Hitachi, Ltd., Hitachi Medical CorporationInventors: Chitose Nakaya, Yoshitaka Bito, Etsuji Yamamoto, Hiroshi Nishimura, Hiroyuki Takeuchi, Shigeru Watanabe, Akihiro Miyajima, Hitoshi Arai
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Patent number: 5403785Abstract: An IC chip package is fabricated from a substrate carrying an IC chip and formed with a conductive pattern of conductors for electrical connection to the IC chip, and a leadframe having a plurality of connector leads with inner and outer lead sites for electrical connection with associated ones of the conductors and with an external circuit, respectively. Fabrication of the IC chip package is made through the steps of placing the inner lead sites into intimate contact on distal ends of the corresponding conductors, and applying ultrasonic vibrations to contacting surfaces between the inner lead sites and the conductors so as to effect diffusion bonding therebetween.Type: GrantFiled: May 19, 1993Date of Patent: April 4, 1995Assignee: Matsushita Electric Works, Ltd.Inventors: Hitoshi Arai, Syuichi Furuichi, Toshiyuki Yamaguchi, Takeshi Kanou, Tooru Higuchi, Muneo Yamada, Toshimasa Kitagawa, Takashi Sugimoto
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Patent number: 5344938Abstract: An indole derivative represented by formula (I): ##STR1## wherein R.sup.1 is a lower alkoxymethyl group or a formyl group, R.sup.2 is a lower alkyl group, R.sup.3 is a hydrogen atom or a lower alkyl group and R.sup.4 is a hydrogen atom or a lower alkyl group, which is useful as an intermediate for the synthesis of a compound, 5-aziridino-3-hydroxymethyl-l-methyl-2- (1H-indole-4,7-dione)prop-.beta.-ene-.alpha.-ol, which has antitumor activity.Type: GrantFiled: April 1, 1993Date of Patent: September 6, 1994Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Masaji Kasai, Hitoshi Arai, Hiroshi Nishikawa, Takehiro Ogasa, Masahiko Kinugawa, Shinji Tomioka
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Patent number: 5334611Abstract: Novel mitomycin derivatives represented by the formula (I) are obtained by introducing a substituent at the 6-position. The mitomycin derivatives of the present invention have an antitumor activity.Type: GrantFiled: August 3, 1993Date of Patent: August 2, 1994Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Hitoshi Arai, Yutaka Kanda, Motomichi Kono, Masaji Kasai, Tadashi Ashizawa, Katsushige Gomi
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Patent number: 5317405Abstract: In a display and image capture apparatus for a videophone or video teleconferencing system a half-transparent mirror array is disposed adjacent the display surface of a display and an image reflected by the half-transparent mirror array is captured by a video camera. The half-transparent mirror array is formed by a plurality of micro HMs arranged in the same plane at a predetermined inclination angle and reflects incident light from a subject toward the video camera.Type: GrantFiled: February 25, 1992Date of Patent: May 31, 1994Assignee: Nippon Telegraph and Telephone CorporationInventors: Makoto Kuriki, Hitoshi Arai, Shigenobu Sakai, Masato Nakamura, Hideki Nakajima, Shirou Suyama, Kazutake Uehira, Noboru Hagiwara
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Patent number: 5256685Abstract: Novel mitomycin derivatives represented by the formula (I) are obtained by introducing a substituent at the 6-position. The mitomycin derivatives of the present invention have an antitumor activity.Type: GrantFiled: March 26, 1992Date of Patent: October 26, 1993Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Hitoshi Arai, Yutaka Kanda, Motomichi Kono, Masaji Kasai, Tadashi Ashizawa, Katsushige Gomi
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Patent number: 5253082Abstract: In an image forming apparatus for forming an ordinary copy or a tonality image for an original image for a printing master, original image data is divided into a predetermined area, and pixel density within the area is subjected to a density conversion in accordance with screen half-toning information which will increase density information toward the approximate center of these pixels, by way of example. The original image data or the density-converted image data is converted into a binary-coded signal conforming to the density, and an output image is formed in accordance therewith. Preferably, a specific mark is supperimposed on the output image.Type: GrantFiled: April 17, 1991Date of Patent: October 12, 1993Assignee: Canon Kabushiki KaishaInventors: Kimiyoshi Hayashi, Hitoshi Arai, Kazuhiko Hirooka
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Patent number: 5218126Abstract: Disclosed are mitomycin derivatives of formula (I): ##STR1## where W represents halogen; X represents methoxy, amino or ethylenimino; Y represents hydrogen or methyl; Z represents hydrogen or methyl; and one of R.sup.1 and R.sup.2 represents carbamoyloxymethyl, and the other represents hydrogen. The derivatives are usable as an antitumor and antibacterial agent.Type: GrantFiled: September 5, 1991Date of Patent: June 8, 1993Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Hitoshi Arai, Masaji Kasai, Katsushige Gomi, Tadashi Ashizawa
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Patent number: 5180825Abstract: Disclosed in a mitomycin derivative represented by the formula (I): ##STR1## wherein W is a heterocyclic group.Type: GrantFiled: November 13, 1991Date of Patent: January 19, 1993Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Hitoshi Arai, Motomichi Kono, Masaji Kasai, Katsushige Gomi, Tadashi Ashizawa