Patents by Inventor Masaaki Terashima
Masaaki Terashima 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: 7276145Abstract: An object of the present invention is to suppress an electric potential drift as described above and improve pH measurement precision in order to obtain practical measurement precision in the dry-type multilayered film-type pH electrode. The present invention provides a complex pH electrode which has at least two ion-selective electrodes comprising a non-conductive support, a pair of electrode layers, an electrolytic layer and an ion-selective membrane where at least one of the ion-selective electrode is a hydrogen ion-selective electrode, wherein the hydrogen ion-selective membrane is saturated with carbon dioxide gas.Type: GrantFiled: July 18, 2003Date of Patent: October 2, 2007Assignee: FUJIFILM CorporationInventors: Masaaki Terashima, Osamu Seshimoto
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Patent number: 7115195Abstract: An ion selective monoelectrode complex which is favorably employable to manufacture an ion activity measuring apparatus, has on a common non-electroconductive support sheet, plural ion selective monoelectrodes each of which is composed of an electrode composite consisting of, in order, a silver metal layer, a silver halide layer, an electrolytic material layer, and an ion selective membrane, and an electroconductive terminal which is electrically connected to the silver metal layer and which has an exposed surface, under the condition that the ion selective monoelectrodes are aligned, without electric contact with each other, along an imaginary line bridging the electrode composite and the electroconductive terminal.Type: GrantFiled: May 27, 2004Date of Patent: October 3, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Terashima, Osamu Seshimoto
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Patent number: 6869512Abstract: A device for measuring ionic activity is composed of: a block of insulating material having a hollow space therein, a solution-receiving surface area in which a pair of openings for receiving a sample solution and a reference solution separately are provided, a plurality of solution-supplying surface areas in each of which a pair of openings for supplying outside the sample solution and the reference solution separately are provided; a bridge member fixed on the solution-receiving surface area; a guide member placed in the hollow space which assists to transmit separately the sample solution and the reference member in the hollow space; and two or more ion selective electrodes each of which is placed on each solution-supplying surface area.Type: GrantFiled: December 6, 2001Date of Patent: March 22, 2005Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Terashima, Osamu Seshimoto
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Publication number: 20040216999Abstract: An ion selective monoelectrode complex which is favorably employable to manufacture an ion activity measuring apparatus, has on a common non-electroconductive support sheet, plural ion selective monoelectrodes each of which is composed of an electrode composite consisting of, in order, a silver metal layer, a silver halide layer, an electrolytic material layer, and an ion selective membrane, and an electroconductive terminal which is electrically connected to the silver metal layer and which has an exposed surface, under the condition that the ion selective monoelectrodes are aligned, without electric contact with each other, along an imaginary line bridging the electrode composite and the electroconductive terminal.Type: ApplicationFiled: May 27, 2004Publication date: November 4, 2004Inventors: Masaaki Terashima, Osamu Seshimoto
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Patent number: 6767578Abstract: An ion selective monoelectrode complex which is favorably employable to manufacture an ion activity measuring apparatus, has on a common non-electroconductive support sheet, plural ion selective monoelectrodes each of which is composed of an electrode composite consisting of, in order, a silver metal layer, a silver halide layer, an electrolytic material layer, and an ion selective membrane, and an electroconductive terminal which is electrically connected to the silver metal layer and which has an exposed surface, under the condition that the ion selective monoelectrodes are aligned, without electric contact with each other, along an imaginary line bridging the electrode composite and the electroconductive terminal.Type: GrantFiled: October 17, 2001Date of Patent: July 27, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Terashima, Osamu Seshimoto
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Patent number: 6767450Abstract: A composite ion selective electrode comprising a calcium ion selective electrode member and a hydrogen ion selective electrode member which is characterized in that a calcium ion selective membrane of the calcium ion selective electrode member has a thickness of 5 to 30 &mgr;m, and the hydrogen ion selective membrane of the hydrogen ion selective electrode member contains tri-n-dodecyl-amine and trisethylhexyl trimellitate. Each of the calcium ion selective electrode member and the hydrogen ion selective electrode member can be employed singly.Type: GrantFiled: March 30, 2001Date of Patent: July 27, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Terashima, Osamu Seshimoto, Yoshikazu Amano
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Publication number: 20040074786Abstract: An object of the present invention is to suppress an electric potential drift as described above and improve pH measurement precision in order to obtain practical measurement precision in the dry-type multilayered film-type pH electrode. The present invention provides a complex pH electrode which has at least two ion-selective electrodes comprising a non-conductive support, a pair of electrode layers, an electrolytic layer and an ion-selective membrane where at least one of the ion-selective electrode is a hydrogen ion-selective electrode, wherein the hydrogen ion-selective membrane is saturated with carbon dioxide gas.Type: ApplicationFiled: July 18, 2003Publication date: April 22, 2004Inventors: Masaaki Terashima, Osamu Seshimoto
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Patent number: 6638404Abstract: In the manufacture of an ion selective electrode composed of a non-electroconductive support, a pair of electrodes each of which has a silver metal layer and a silver halide layer, an electrolytic material layer, an ion selective membrane, and a non-electroconductive sheet having a pair of openings for receiving a sample solution and a reference solution, respectively, and having thereon a bridge member for electrically connecting the sample solution received in one opening and the reference solution received in another opening, the ion selective membrane is advantageously divided into two separate portions, one of which is placed in a position above one electrode and another of which is placed in a position above another electrode.Type: GrantFiled: July 23, 2001Date of Patent: October 28, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Terashima, Osamu Seshimoto
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Patent number: 6616822Abstract: A silver/silver halide electrode composed of a non-electroconductive support sheet, a silver metal layer and a silver halide layer in order, is improved in its sensitivity by making the silver halide layer almost free from heavy metal element, for instance, by oxidizing the silver metal layer on its surface side with an oxidizing compound containing no heavy metal element or a chelated ferric oxidizing compound in the presence of a halide containing no heavy metal element.Type: GrantFiled: March 11, 2002Date of Patent: September 9, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Terashima, Toshihisa Ito, Osamu Seshimoto
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Publication number: 20030116434Abstract: The package of a multilayer film electrode web for an electrolyte slide of the invention comprises a packaging film web and the multilayer film electrode web superposed to each other, wherein the multilayer film electrode web is provided with an ion-selective membrane at central portion of the web, wherein the packaging film web is provided with raised portions on both side ends having a height higher than the thickness of the ion-selective membrane, wherein the ion-selective membrane is arranged to exist between the raised portions on both side ends, which protects the ion-selective membrane from being damaged by a foreign body.Type: ApplicationFiled: November 25, 2002Publication date: June 26, 2003Inventors: Masaaki Terashima, Takeshi Igarashi, Osamu Seshimoto, Sadao Yamada
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Publication number: 20020134679Abstract: A silver/silver halide electrode composed of a non-electroconductive support sheet, a silver metal layer and a silver halide layer in order, is improved in its sensitivity by making the silver halide layer almost free from heavy metal element, for instance, by oxidizing the silver metal layer on its surface side with an oxidizing compound containing no heavy metal element or a chelated ferric oxidizing compound in the presence of a halide containing no heavy metal element.Type: ApplicationFiled: March 11, 2002Publication date: September 26, 2002Inventors: Masaaki Terashima, Toshihisa Ito, Osamu Seshimoto
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Publication number: 20020063058Abstract: An ion selective monoelectrode complex which is favorably employable to manufacture an ion activity measuring apparatus, has on a common non-electroconductive support sheet, plural ion selective monoelectrodes each of which is composed of an electrode comosite consisting of, in order, a silver metal layer, a silver halide layer, an electrolytic material layer, and an ion selective membrane, and an electroconductive terminal which is electrically connected to the silver metal layer and which has an exposed surface, under the condition that the ion selective monoelectrodes are aligned, without electric contact with each other, along an imaginary line bridging the electrode composite and the electroconductive terminal.Type: ApplicationFiled: October 17, 2001Publication date: May 30, 2002Inventors: Masaaki Terashima, Osamu Seshimoto
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Publication number: 20020033335Abstract: In the manufacture of an ion selective electrode composed of a non-electroconductive support, a pair of electrodes each of which has a silver metal layer and a silver halide layer, an electrolytic material layer, an ion selective membrane, and a non-electroconductive sheet having a pair of openings for receiving a sample solution and a reference solution, respectively, and having thereon a bridge member for electrically connecting the sample solution received in one opening and the reference solution received in another opening, the ion selective membrane is advantageously divided into two separate portions, one of which is placed in a position above one electrode and another of which is placed in a position above another electrode.Type: ApplicationFiled: July 23, 2001Publication date: March 21, 2002Inventors: Masaaki Terashima, Osamu Seshimoto
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Publication number: 20010035356Abstract: A composite ion selective electrode comprising a calcium ion selective electrode member and a hydrogen ion selective electrode member which is characterized in that a calcium ion selective membrane of the calcium ion selective electrode member has a thickness of 5 to 30 &mgr;m, and the hydrogen ion selective membrane of the hydrogen ion selective electrode member contains tri-n-dodecyl-amine and trisethylhexyl trimellitate. Each of the calcium ion selective electrode member and the hydrogen ion selective electrode member can be employed singly.Type: ApplicationFiled: March 30, 2001Publication date: November 1, 2001Applicant: Fuji Photo Film Co., Ltd.Inventors: Masaaki Terashima, Osamu Seshimoto, Yoshikazu Amano
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Patent number: 5547874Abstract: An aqueous dispersion used for control or calibration of a dry analysis element comprising at least one color producing reagent and a porous layer, which comprises water-insoluble liquid particles having a mean particle size of from about 0.01 to about 10 .mu.m selected from the group consisting of phthalates, trimellitates, phosphates, benzoates, amides, phenols, aliphatic esters, hydrocarbons, halogenated hydrocarbons, adipates, sebacates and natural polymers dispersed therein and a substance which is the same as or similar to the analyte to be determined wherein said substance is selected from the group consisting of glucose, urea, uric acid, creatinine, bilirubin, hemoglobin, triolein, glycerine, cholesterol, triglyceride, (NH.sub.4).sub.2 SO.sub.4, NH.sub.4 Cl, CaCl.sub.2, Ca(NO.sub.3).sub.2, MgCl.sub.2, NaCl, KCl, K.sub.2 HPO.sub.4, (NH.sub.4).sub.2 SO.sub.4, Ca(NO.sub.3).sub.2, and NaNO.sub.3.Type: GrantFiled: April 5, 1995Date of Patent: August 20, 1996Assignee: Fuji Photo Film Co., Ltd.Inventor: Masaaki Terashima
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Patent number: 5510082Abstract: A plurality of dry chemical analysis films are stacked in a cartridge. A chemical analysis film supplier has a cartridge storage chamber in which a plurality of cartridges are stored so that the chemical analysis films in each cartridge can be taken out by a chemical analysis film removing device. In the the cartridge storage chamber, the cartridges are arranged in a circle, and a moisture-absorber holding portion is formed inside the circle of the cartridges, and a moisture absorber is loaded in the moisture-absorber holding portion.Type: GrantFiled: October 18, 1994Date of Patent: April 23, 1996Assignee: Fuji Photo Film Co., Ltd.Inventors: Kenji Arai, Masaaki Terashima, Yoshiyuki Doi
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Patent number: 5348889Abstract: An improved calibration method for calibrating the measured value of an analyte in a liquid sample by referring to a calibration curve drawn by plotting the interrelation between the calibration values of n (n is an integer of not less than 2) calibrators containing different contents of the analyte and the measured values of the analyte contained in respective calibrators.Type: GrantFiled: September 4, 1992Date of Patent: September 20, 1994Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Terashima, Hajime Makiuchi
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Patent number: 5308767Abstract: A method for control or calibration in a chemical analytical determination using a dry analysis element comprising at least one color-producing reagent and a porous layer, wherein the method comprises applying an aqueous dispersion onto the porous layer and measuring the optical density of the color produced, wherein the aqueous dispersion comprises a substance which is the same as or similar to an analyte to be determined and water-insoluble particles dispersed therein, wherein the particles are particles of a homopolymer, a copolymer, phthalates, trimellitates, phosphates, benzoates, amides, phenols, aliphatic esters, hydrocarbons, halogenated hydrocarbons, adipates, sebacates and natural polymers.Type: GrantFiled: July 20, 1992Date of Patent: May 3, 1994Assignee: Fuji Photo Film Co., Ltd.Inventor: Masaaki Terashima
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Patent number: 4865698Abstract: A reference solution for measuring an ionic activity which is utilized at the time of measuring the activity of a particular ion in an aqueous solution by the differential method using ion-selective electrodes, which is characterized by containing the compound having the general formula (I), (II) or (III) and an electrolyte. ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent hydrogen atom or a lower alkyl group, respectively, and at least, one or R.sub.3 and R.sub.4 is a lower alkyl group, and X represents chlorine atom or bromine atom, ##STR2## wherein R.sub.5 represents hydrogen atom or a lower alkyl group and A represents a hydrogen atom or a halogen atom, and ##STR3## wherein R.sub.6 represents a hydrogne atom or a lower alkyl group.Type: GrantFiled: March 17, 1987Date of Patent: September 12, 1989Assignee: Fuji Photo Film Co., Ltd.Inventor: Masaaki Terashima
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Patent number: 4842712Abstract: In a device for measuring ion activity in a liquid sample such as a body fluid comprising at least one pair of ion-selective electrodes selectively responsive to a specific ion, a porous liquid distributing member for feeding a liquid sample to one electrode of the pair of electrodes, a porous liquid distributing member for feeding a reference liquid to another electrode of the pair of electrodes and a porous bridge for electrically connecting both liquids to each other, the improvement wherein the liquid distributing members are made of a nonwoven fabric composed of cellulosic long fibers.Type: GrantFiled: February 2, 1987Date of Patent: June 27, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Osamu Seshimoto, Masaaki Terashima, Yoshio Saito