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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 7459216 | Polyimide copolymer and metal laminate using the same A novel polyimide copolymer, which is a copolymer comprising two kinds of tetracarboxylic acid dianhydrides consisting of (A) isopropylidene-bis(4-phenyleneoxy-4-phthalic acid) dianhydride and (B) 3,3′,4,4′-biphenyltetracarboxylic acid dianhydride, and one kind ... | 12/02/2008 |
| 6981315 | Method of manufacturing a flexure blank The invention is directed toward a method of manufacturing a flexure blank whereby an opening portion is provided in a in a connecting portion of a flexure blank, an opening end portion of an insulating base layer is coated with a conductive member without exposing ... | 01/03/2006 |
| 6972383 | Multilayered circuit board A multilayered circuit board has good imbedding properties for circuit patterns, and an interlayer insulating material having superior adhesive force and interlayer insulating properties. In a multilayered circuit board wherein interlayer connection is achieved by t... | 12/06/2005 |
| 6914098 | Acrylic elastomer and its composition A butenedioic acid monoalkyl ester-copolymerized acrylic elastomer containing 0.1-30% by mole of unreacted butenedioic acid monoalkyl ester on the basis of carboxyl groups copolymerized in the acrylic elastomer or its cross-linkable composition. The cross-linkable c... | 07/05/2005 |
| 6770733 | Polyimide copolymer A film-formable polyimide copolymer, which comprises two kinds of tetracarboxylic acid dianhydride consisting of (A) pyromellitic acid dianhydride and (B) 3,3′,4,4′-benzophenonetetracarboxylic acid dianhydride, and (C) 6-amino-2-(p-aminophenyl)benzimidazole has ... | 08/03/2004 |
| 6713682 | Through hole conduction structure of flexible multilayer circuit board and forming method thereof In case of manufacturing a flexible multilayer circuit board which comprises an internal layer circuit board which can be a cable portion and an external layer circuit board which can be a component mounting portion laminated on one side or both sides of the interna... | 03/30/2004 |
| 6687984 | Method for manufacturing flexible multilayer circuit board An internal layer circuit board to which an opening portion 14 is provided at a predetermined position and a required wiring pattern 1 is formed so as to expose a terminal portion 1A to the opening portion 14 is manufactured. Subsequently, single-sided co... | 02/10/2004 |
| 6633487 | Method for manufacturing hybrid circuit board A required interlayer circuit board 1 is constituted so as to provide a punched portion in which only a collapsible cable portion 2 for connecting a plurality of component mounting portions to each other is exposed. An external layer board 6 is superimpos... | 10/14/2003 |
| 6617519 | Flexible printed circuit board and manufacturing method A flexible printed circuit board including a component mount section, which an electronic component is mounted on, and a cable section, which connects to the component mount section; circuit patterns being provided on the cable section, and covered by a s... | 09/09/2003 |
| 6582885 | Polyimides, process for producing the same and photosensitive composition containing the same Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a carboxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a carboxyl group-containing diamine and an ar... | 06/24/2003 |
| 6523257 | Method for forming fine through hole conduction portion of circuit board In order to realize through hole conduction of an internal layer wiring pattern 4 and respective external layer conduction layers 2 and 5 on both sides, a through hole partially blocked is formed to the internal layer wiring pattern 4 from one external la... | 02/25/2003 |
| 6500011 | Flexure blank and method of manufacturing the same An opening portion is provided in a connecting portion of a flexure blank, an opening end portion of an insulating base layer is coated with a conductive member without exposing the opening end portion of the insulating base layer in the connecting portio... | 12/31/2002 |
| 6489436 | Polyimide copolymer and metal laminate using the same Novel polyimide copolymer, which is a copolymer of isopropylidene-bis-(4-phenyleneoxy-4-phthalic acid)dianhydride and 6-amino-2-(p-aminophenyl)benzimidazole or a copolymer of two kinds of tetracarboxylic acid dianhydrides consisting of isopropylidene... | 12/03/2002 |
| 6486290 | Polyimides, process for producing the same and photosensitive composition containing the same Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a carboxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a carboxyl group-containing diamine and an ar... | 11/26/2002 |
| 6469217 | Process for preparing fluoropolymer The polymerization initiator-containing solution obtained by mixing a specific perfluorodicarboxylic acid fluoride (A) with CsF in an aprotic polar solvent with stirring to conduct reaction and thereby form a polymerization initiator (B) and then allowing... | 10/22/2002 |
| 6380337 | Fluoroelastomer, production thereof, crosslinkable composition and curing product A fluoroelastomer comprising constituent units derived from vinylidene fluoride (a) and constituent units derived from perfluoro(methoxypropyl vinyl ether) (b), optionally together with constituent units derived from tetrafluoroethylene (c) and/or constit... | 04/30/2002 |
| 6303699 | Vulcanizable fluororubber produced from tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer Disclosed is a vulcanizable fluororubber composition comprising (a) a tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer, (b) an organic peroxide, (c) a co-crosslinking agent and (d) hydrotalcite. The copolymer (a) preferably contains an iodine atom... | 10/16/2001 |
| 6281312 | Process for producing fluorinated copolymer, fluorinated copolymer, crosslinkable composition containing same and sealant Vinylidene fluoride and chlorotrifluoroethylene are copolymerized in the presence of a compound represented by the general formula I: In Brm R (I) wherein R represents a fluorohydrocarbon group, a chlorofluorohydrocarbon group, a chloroh... | 08/28/2001 |
| 6124404 | Process for producing fluorine-containing graft copolymer A fluorine-containing graft copolymer produced by copolymerizing at least two kinds of monomers selected from the group consisting of fluorinated monomers and propylene in the presence of a saturated iodine-containing compound or an iodine and bromine-con... | 09/26/2000 |
| 6121372 | Aqueous emulsion component for a water- and oil-repellant agent An aqueous emulsion for use as a water- and oil-repellent agent, which aqueous emulsion is produced by copolymerizing least one of lower alkyl methacrylate, benzyl (meth)acrylate and vinylidene chloride with polyfluoroalkyl group-containing (meth)acrylate... | 09/19/2000 |
| 6114459 | Vulcanizable acrylic elastomer composition including an acrylic elastomer, an organic peroxide, and a polyfunctional unsaturated compound An acrylic elastomer obtained by copolymerization of about 60 to about 99.9% by weight of at least one of alkyl acrylate and alkoxyalkyl acrylate; about 10 to about 0.1% by weight of a halogen-containing vinyl compound having a secondary or tertiary halog... | 09/05/2000 |
| 6096850 | Polyimides, process for producing the same and photosensitive composition containing the same Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a hydroxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a hydroxyl group-containing diamine and an ar... | 08/01/2000 |
| 6025461 | Photosensitive polyimide A photosensitive polyimide, which comprises a copolymer of (A) three diamine compounds mixture consisting of a diaminopolysiloxane, a hydroxyl group-containing diamine or carboxyl group-containing diamine and 1,4-bis[2-(3-aminobenzoyl)ethenyl]benzene with... | 02/15/2000 |
| 6015860 | Acrylic elastomer composition An acrylic elastomer composition, which comprises a carboxyl group-containing acrylic elastomer, a polyfunctional isocyanate compound or a blocked isocyanate, and at least one of a guanidine, a quaternary onium salt, a tertiary amine and a tertiary phosph... | 01/18/2000 |
| 6011129 | Process for producing fluorine-containing elastomer Fluorine-containing elastomers produced through copolymerization reaction of vinylidene fluoride, tetrafluoroethylene, perfluoro(lower alkyl vinyl ether) and chlorotrifluoroethylene in the presence of a bromine-containing monomer compound and an iodine- a... | 01/04/2000 |
| 6008300 | Bisphenol compound and fluorine-containing elastomer composition containing the same A bisphenol compound represented by the following general formula: ##STR1## where R is an alkylene group having 1 to 5 carbon atoms, an alkylidene group having 1 to 5 carbon atoms, a perfluoroalkylene group having 1 to 5 carbon atoms, a perfluoroalky... | 12/28/1999 |
| 6001932 | Acrylic copolymer elastomer, its blend rubber and blend rubber composition A copolymer comprising an alkyl acrylate and an unsaturated ester compound represented by the following general formula: CH2 .dbd.CRCOO(CH2)nPhOR', (1) CH2 .dbd.CRCOO(CH2)nOCO(CH2)mPhOR', ... | 12/14/1999 |
| 5998564 | Process for producing bisthiophenolperfluoroalkylidene compound 2.2'-bis(3-mercaptophenyl)hexafluoropropane [bisthio-phenol AF] is obtained in good yield by chlorosulfonating 2.2'-bisphenylhexafluoropropane and reducing the thus quantitatively obtained 2,2'-bis(3-chlorosulfonylphenyl)-hexafluoropropane with zinc under... | 12/07/1999 |
| 5994487 | Fluoroelastomer and its cross-linkable composition A fluoroelastomer comprising 74 to 80% by mole of vinylidene fluoride, 4 to 12% by mole of tetrafluoroethylene, 14 to 18% by mole of hexafluoropropene and 0.3 to 1.3% by mole of perfluoro(alkyl vinyl ether), the sum total being 100% by mole, gives vulcani... | 11/30/1999 |
| 5986038 | Adhesive composition An adhesive composition comprising a fluorinated elastomer having dicyclopropane rings formed by reaction of chloroform with unsaturated bonds introduced into the molecule of fluorinated elastomer by an alkali treatment, as an adhesive component has a goo... | 11/16/1999 |
| 5981423 | Process for preparing vulcanization promoter for fluorine-containing elastomers A vulcanization promoter for fluorine-containing elastomers prepared by (1) allowing 1.01 to 1.15 moles of a quaternary phosphonium salt to react with one mole of monoalkali metal salt of bisphenol AF in alcohol, (2) allowing 2.02 to 2.30 moles of a quate... | 11/09/1999 |
| 5969066 | Fluoroelastomer and its cross-linkable composition A fluoroelastomer comprising 2 to 8% by mole of tetrafluoroethylene, 14 to 25% by mole of perfluoro(alkyl vinyl ether) and 70 to 85% by mole of vinylidene fluoride, sum total being 100% by mole, obtained by copolymerization in the presence of a bromine-co... | 10/19/1999 |
| 5965656 | Process for preparing aqueous emulsion An aqueous emulsion having distinguished water- and oil-repellency and quite free from any organic solvent is prepared by emulsion polymerization of a polyfluoroalkyl group-containing (meth)acrylic acid ester and stearyl (meth)acrylate at a pH condition o... | 10/12/1999 |
| 5961334 | Suspension connection structure for a magnetic head A connection structure of a suspension for a magnetic head suitable for assembly automation is provided. The connection structure of a suspension for a magnetic head comprises a suspension (1) for a magnetic head which includes a circuit wiring pattern (4... | 10/05/1999 |
| 5959037 | Acrylic copolymer elastomer, its blend rubber and blend rubber composition A novel acrylic copolymer elastomer comprising I! an alkyl acrylate; II! (a) CHa .dbd.CRCOOR2 OCOR1, (b) CH2 .dbd.CRCOO(CH2) pCO!qOR1 or (c) CH2 .dbd.CRCOOR2 C... | 09/28/1999 |
| 5942598 | Perfluoroalkyleneethertriazine oligomer and process for producing the same Perfluoroalkyleneethertriazine oligomer obtained by reacting a dinitrile compound NC-Rf0 --CN, where Rf0 is --(CFXOCF2)a (CF2)b (CF2 OCFX)c --, where X is a fluorine atom o... | 08/24/1999 |
| 5942592 | Siloxane polyimide and heat-resistant adhesive containing the same A solvent-soluble siloxane polyimide comprising a copolymer obtained by reaction of a diamine compound mixture comprising a diaminopolysiloxane, an alicyclic diamine and an aromatic diamine with an aromatic tetracarboxylic acid anhydride, followed by poly... | 08/24/1999 |
| 5942580 | Acrylic rubber composition An acrylic rubber composition comprising a halogen-containing acrylic rubber, a vulcanizing agent and at least one unsaturated compound selected from the group consisting of (1) -olefins having at least 4 carbon atoms, (2) carboxylic acid vinyl est... | 08/24/1999 |
| 5910552 | Fluorine-containing copolymer elastomer process for producing the same and composition containing the same A novel fluorine-containing copolymer elastomer having bromine groups as cross-linkable groups, which comprises about 45 to about 80% by mole of tetrafluoroethylene, about 50 to about 20% by mole of a perfluoro(vinylether) represented by the following gen... | 06/08/1999 |
| 5898054 | Process for producing fluorine-containing elastomer A peroxide-vulcanizable fluorine-containing elastomer containing iodines as cross-linking sites, capable of producing vulcanization products having a distinguished heat resistance is produced by polymerization reaction of a fluorinated olefin having 2 to ... | 04/27/1999 |
