Organic Base Patents (Class 427/316)
  • Patent number: 4331738
    Abstract: A composition of a blend of a carboxylated copolymer latex having a Tg of not less than about -30.degree. C. such as a copolymer of styrene, itaconic and methacrylic acids and butadiene-1,3 and an acrylate copolymer latex having a Tg of not less than about +30.degree. C. such as a copolymer of ethylacrylate, methyl methacrylate and acrylamide containing a minor amount by weight of a heat sensitizer sufficient to gel the composition and which also can contain fillers, wetting agents and stabilizers, and so forth can be used to provide a water resistant film on the surface of a hot rubber compound or composition which subsequently can be cooled rapidly with water and dried. The resulting latex coated rubber can then be stacked or assembled without sticking.
    Type: Grant
    Filed: December 4, 1980
    Date of Patent: May 25, 1982
    Assignee: The General Tire & Rubber Company
    Inventor: Tiong H. Kuan
  • Patent number: 4322455
    Abstract: A process for producing an ultraviolet radiation stabilized polymeric, particularly polycarbonate, article comprising impregnation of the surface of said article with an ultraviolet radiation absorber by heating said polymeric article and applying onto the surface of said heated article an ultraviolet radiation stabilizing composition containing an ultraviolet radiation absorbing compound and a nonaggressive carrier.
    Type: Grant
    Filed: September 15, 1980
    Date of Patent: March 30, 1982
    Assignee: General Electric Company
    Inventors: Daniel R. Olson, Ta Y. Ching
  • Patent number: 4318963
    Abstract: This invention provides for improvement in the preservation of cellulosic materials through solubilization of a dried metal alkoxide, particularly magnesium methoxide, in an alcohol with the presence of carbon dioxide. The solution is applied to cellulosic materials by various known methods resulting in deacidification with improved aging properties imparted to the materials. The treated cellulosic materials have improved characteristics and printed materials do not blur or run.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: March 9, 1982
    Inventor: Richard D. Smith
  • Patent number: 4316931
    Abstract: A method for improving the heat retention of a planar textile structure by coating at least one surface of the structure with a dispersion of liquid carrier, cross-linkable binder and metallic powder, and then cross-linking the binder and removing the liquid carrier from the coating.
    Type: Grant
    Filed: February 25, 1980
    Date of Patent: February 23, 1982
    Assignee: Firma Carl Freudenberg
    Inventors: Kurt Tischer, Bohuslav Tecl, Walter Fottinger
  • Patent number: 4287223
    Abstract: A steel pipe with a thermoplastic cover has the coverage of a welding seam reinforced by hot air heating the cover along the plastic and extruding a strip of similar plastic thereon, followed by cold water spray cooling. The pipe is centered as to the position of the welding seam vis-a-vis the heating and extruding equipment during relative longitudinal movement.
    Type: Grant
    Filed: November 14, 1979
    Date of Patent: September 1, 1981
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Karl-Heinz Hackert, Helmut Blume
  • Patent number: 4273552
    Abstract: A process for the pretreatment of cellulose fibers which are printed according to the thermotransfer printing process, which comprises impregnating the fiber material with a solution or dispersion containing a compound of the formula ##STR1## in which x is 2 or 3, A represents--if x=2--a group of the formula ##STR2## or -if x=3 --represents a group of the formula ##STR3## W is a group of the formula --CH.sub.2 --or ##STR4## R is hydrogen or methyl, m is a number of from 1 to 30, preferably from 4 to 11, and n is a number of from 1 to 30, preferably from 1 to 10, as well as a polymerization catalyst, and steaming and drying the material.
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: June 16, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Ehrenfried Nischwitz
  • Patent number: 4267290
    Abstract: A method of making grinding wheel mounts by molding a central hub onto a thermoset plastic abrasive disc is provided. An aromatic polycarbonate thermoplastic resin is molded to form a hub on a cured thermoset plastic abrasive disc. It is believed that the polycarbonate forms both a mechanical and chemical bond with the thermoset plastic to provide an efficient method of producing grinding wheels.
    Type: Grant
    Filed: April 4, 1978
    Date of Patent: May 12, 1981
    Inventor: William F. Sherman
  • Patent number: 4258088
    Abstract: Foamed liquid mixtures are applied to substrates, in particular foamed plywood glues, are spread on traveling wood veneers in the manufacture of plywood by a method comprising the following steps: The liquid is withdrawn from a source of the same, is subjected to a mechanical beating action wherein its density is reduced and is then passed to a reservoir or feed storage vessel. Density-reduced liquid is then foamed and the foam is continuously extruded or otherwise spread on an intermittently-moving substrate during the periods of motion of the substrate. The foamed liquid is continuously diverted from the substrate during the periods of rest of the substrate. The diverted foamed liquid then is defoamed by subjecting it to the same mechanical beating action applied to the liquid thereby increasing its density to substantially that of the density-reduced liquid.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: March 24, 1981
    Inventors: Charles N. Cone, Julius M. Steinberg
  • Patent number: 4256785
    Abstract: Coated pellets are produced by forming pellets having about 20% or more void space, contacting the pellets with a suspension of polymeric particles, reducing the temperature of the particles to create a pressure differential between the voids and the atmosphere to draw in liquid from the suspension and filter polymeric particles on the surface to form a coating.
    Type: Grant
    Filed: July 25, 1979
    Date of Patent: March 17, 1981
    Assignee: Eastman Kodak Company
    Inventor: Clarence C. Dannelly
  • Patent number: 4217395
    Abstract: A carboxylated polymer latex containing a minor amount by weight of a heat sensitizer sufficient to gel the polymer and which also can contain fillers, wetting agents and stabilizers can be used to provide a water resistant film on the surface of a hot rubber compound or composition which subsequently can be cooled rapidly with water and dried. The resulting latex coated rubber can then be stacked or assembled without sticking.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: August 12, 1980
    Assignee: The General Tile & Rubber Company
    Inventors: Tiong Ho Kuan, John G. Sommer
  • Patent number: 4169181
    Abstract: Improved impact or shock resistant soft coated laminates including a back polycarbonate lamina opposite the direction of impact or shock, such polycarbonate lamina having a soft overlying or exposed layer or coating opposite the direction of impact, are provided. The laminates exhibit excellent resistance to failure and spalling of the polycarbonate surface opposite the impact or shock receiving surface.The soft coat is a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups and confers on the laminates excellent scratch resistance, good resistance against swelling and stress cracking while at the same time the laminates exhibit good clarity and integrity in addition to good chemical and permeation resistance, as well as resistance to failure and spalling. The process employs the polyurethane in film form as a cap sheet.
    Type: Grant
    Filed: November 29, 1977
    Date of Patent: September 25, 1979
    Assignee: General Electric Company
    Inventor: Richard E. Molari, Jr.
  • Patent number: 4141735
    Abstract: A heat-tempered film element having a core-set curling tendency and a net core-set curl at least about 15% below that of a similar non-heat-tempered film element is provided by a process which comprises heating a sheet or roll of self-supporting, core-set-prone thermoplastic polymeric film, which is non-coated or is coated with one or more layers on at least one surface, under ambient relative humidity of less than 100%, at a temperature in the temperature range of from about 30.degree. C. up to about the glass transition temperature (Tg) of said polymer for 0.1 to 1500 hours, said heating being continued until the change in the number of ANSI curl units that the resulting film undergoes upon subsequent core-setting at 21.degree. C. and 50% R.H. for 2200 hours is reduced by at least 15%, compared to the change in the number of ANSI curl units untreated thermoplastic polymer film undergoes upon core-setting under like conditions.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: February 27, 1979
    Assignee: Eastman Kodak Company
    Inventors: Robert W. Schrader, John F. Carroll, Jr.
  • Patent number: 4137345
    Abstract: An article for conditioning fabrics by contacting them and applying conditioning material to the fabric surfaces is made by raising the temperature of a conditioning composition including said conditioning material until it forms a melt, in which state it is fluid and readily applicable to a base for the conditioning article, and applying said fluid composition to a base article so that a surface thereof is coated with the composition. Following application, the composition is cooled sufficiently to convert it to the solid state, in which it forms an adherent coating on the base.The process is especially useful in coating form retaining bases with a layer of a conditioning material such as a fabric softener, which is designed to be rubbed off onto tumbling damp laundry in an automatic laundry dryer, while the dryer is being heated.
    Type: Grant
    Filed: June 10, 1974
    Date of Patent: January 30, 1979
    Assignee: Colgate Palmolive Company
    Inventor: Pasquale J. Falivene
  • Patent number: 4132817
    Abstract: A method of forming a layer of blown cellular urethane on a primary carpet backing comprising the steps of preparing a mixture of reactive urethane forming agents, controlling the temperature of the reactive mixture, shaping the reactive mixture into a layer upon a latex film, heating the urethane forming mixture to initiate chemical blowing of the mixture, applying the underside of a previously tufted and heated primary carpet backing directly to the upper surface of the mixture, heating the mixture to a predetermined temperature, applying pressure to the carpet and mixture and stripping the carpet and cellular urethane layer from the conveyor belt.
    Type: Grant
    Filed: January 25, 1978
    Date of Patent: January 2, 1979
    Assignee: Textile Rubber and Chemical Co., Inc.
    Inventor: John G. Tillotson
  • Patent number: 4131698
    Abstract: A process for pretreating polyvinyl chloride plastics to form adherent non-grainy conformal metal coatings by electroless deposition comprising immersing the polyvinyl chloride plastic in a solution comprising at least about 10 grams of alkali metal hydroxide dissolved in a solution consisting of about 5% to about 30% by volume of a water-soluble mono-, di-, or polyhydric alcohol and about 70% to about 95% by volume of water. The immersion time is variable from about 5 minutes in ultrasonically agitated, mildly heated solutions to about 6 to about 8 hours in non-agitated, unheated solutions. After pretreatment, the polyvinyl chloride plastic is treated by standard electroless plating procedures known in the art.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: December 26, 1978
    Assignee: RCA Corporation
    Inventor: Cheryl A. Deckert
  • Patent number: 4122219
    Abstract: In the manufacture of flocked textiles by applying a polymer emulsion, flocking and drying, a heat-sensitized polymer emulsion is used and the emulsion coat is first only gelled, by heating, in the zone adjoining the textile substrate, and is then flocked and dried at an elevated temperature.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: October 24, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Fickeisen, Gert Elschnig, Hanns-Dietmar Haertl, Kurt Wendel, Klaus Eisentraeger
  • Patent number: 4113912
    Abstract: A hydrophilic porous structure comprising a porous fluorocarbon resin structure with the pores of the fluorocarbon resin structure containing at least one water-insolubilized water-soluble polymer and a process for the production thereof.
    Type: Grant
    Filed: August 10, 1977
    Date of Patent: September 12, 1978
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Koichi Okita
  • Patent number: 4101689
    Abstract: An antistatic and/or electrically conductive floor covering which comprises a sheet of a thermoplastic synthetic resin which is substantially electrically non-conductive, said sheet having a plurality of holes penetrating therethrough and electrically conductive material filling said holes with one side of the sheet being coated with said conductive material so that the materials in each of said holes are connected to one another.
    Type: Grant
    Filed: June 22, 1973
    Date of Patent: July 18, 1978
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Michael Wienand, Ernst Juch
  • Patent number: 4096303
    Abstract: The method of this disclosure relates to the application of a foam layer, in fluid form, to either an impervious or a relatively porous substrate and to the formation of a contoured foam laminate using a relatively rigid foam. The method of applying foam to a porous substrate includes heating the substrate prior to the application of the fluid foam. Upon striking the heated substrate, the foam forms a blow barrier to prevent foam bleedthrough. The method also optionally includes forming the laminate in a die prior to completion of foaming.The laminate includes a flexible substrate, preferably a polyurethane foam layer and an optional lattice skrim located between the substrate and the exposed surface of the foam layer.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: June 20, 1978
    Assignee: Detroit Gasket and Manufacturing Company
    Inventor: Ralph G. Doerfling
  • Patent number: 4078100
    Abstract: The method of this disclosure permits the application of a foam layer, in fluid form, to a relatively porous substrate and the formation of a contoured foam laminate using a relatively rigid foam. The method includes heating the substrate prior to application of the fluid foam and forming the laminate in a die prior to completion of foaming. The laminate includes a flexible substrate, preferably a polyurethane foam layer and a lattice skrim located between the substrate and the exposed surface of the foam layer.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: March 7, 1978
    Assignee: Detroit Gasket Company
    Inventor: Ralph G. Doerfling
  • Patent number: 4060503
    Abstract: An adhesive composition which comprises an admixture of at least one of natural rubber and synthetic rubbers with a tackifying resin containing carbon-to-carbon unsaturation therein prepared by reacting in the presence of an aliphatic solvent and a catalyst selected from aluminum chloride and ethyl aluminum dichloride a monomer mixture comprised of about 88 to about 98 weight percent of a selected diolefin/olefin mixture and, correspondingly, about 12 to about 2 weight percent .alpha.-methyl styrene. Said adhesive composition has particular utility for use as a pressure sensitive adhesive.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: November 29, 1977
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: George W. Feeney, Bruce W. Habeck
  • Patent number: 4052521
    Abstract: A method of coating a fabric material and calendering the material while longitudinally and transversely tensioning the material, the coating being synthetic and being applied to one side of the material, and being heated in a curing oven. Then applying more synthetic material of a similar type to the calendered and heated material and then passing it through another oven and calendering it again before the tensioning is relaxed.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: October 4, 1977
    Inventor: Serge Ferrari
  • Patent number: 4051276
    Abstract: This invention relates to solutions of selected organo-metallic compounds ssolved in an organic solvent which are useful for deacidifying a cellulose fiber paper. The paper is treated by means well known in the art, such as dipping or spraying. The organo-metallic compounds useful in this invention are compounds which may be rapidly hydrolyzed to an alkaline material such as lower alkyl compounds of lithium, aluminum, magnesium, gallium, zinc, and mixtures of these compounds. The organic solvent is a liquid which will not react with the organo-metallic compound, dissolve inks, or cause discoloration of other materials usually found in and around printed matter. After the paper is impregnated with the solution the organo-metallic compound remaining on the paper is hydrolyzed to an alkaline material.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: September 27, 1977
    Assignee: The United States Government as represented by the Librarian of Congress
    Inventors: John C. Williams, George B. Kelly, Jr.
  • Patent number: 4024304
    Abstract: A porous article with a special finish treatment is provided, the article typically being an article of furniture, such as a cabinet door, by way of illustration. The article can be made of a molding compound comprising discrete glass fibers which can be produced by milling cured phenolic-bonded glass fibers. A coupling agent or binder is added to the milled fibers and the combination formed and cured under heat and pressure into the shape of the article. The surface of the formed article is porous and, in fact, the article is porous throughout its thickness. This presents a substantial problem in applying a satisfactory finish. To overcome this, with the article at an elevated temperature, it is immersed in a liquid containing particles in suspension, i.e. polyester liquid containing talc.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: May 17, 1977
    Assignee: Owens-Corning Fiberglas Corporation
    Inventors: George E. Smock, Gregory C. Brock, Jr., Homer G. Hill, Kenneth L. Austin
  • Patent number: 4020197
    Abstract: The present invention provides copper (I) ion compound bath solutions for the catalytic sensitization and metallization by electroless metal deposition of non-metallic surfaces, as well as processes for the application and re-claiming of said solutions.
    Type: Grant
    Filed: February 5, 1975
    Date of Patent: April 26, 1977
    Assignee: Kollmorgen Technologies Corporation
    Inventor: Horst Steffen
  • Patent number: 4018948
    Abstract: This invention relates to a method of adhering polyurethane to a cured rubber stock of the natural or synthetic type, where the rubber was compounded with a sulfur curative of at least one part of a polyol of less than 7000 molecular weight and cured. This composition would be useful for making white sidewalls and related laminates.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: April 19, 1977
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Jeffrey W. Saracsan, Paul H. Sandstrom
  • Patent number: 4009037
    Abstract: Improving the adhesion of a gelatin coating to a styrene homopolymer or copolymer film by solvent treating and corona discharge treating the film prior to coating with a gelatin layer in the production of a coated photobase.
    Type: Grant
    Filed: January 21, 1974
    Date of Patent: February 22, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventors: David Roderick Mann, James Albert Barker
  • Patent number: 3997686
    Abstract: An ornament is produced by drying an animal dropping, removing the natural outer coating to expose the interior grain and treating the dropping with a plastic or synthetic resin to form a hard transparent coating. The resulting product is an ornament that can be used to form a necklace, brooch, cuff links or other attractive jewelry piece.
    Type: Grant
    Filed: October 16, 1974
    Date of Patent: December 14, 1976
    Inventor: Stewart McClure
  • Patent number: 3974014
    Abstract: A simplified, low-cost method and apparatus for transferring inked design images from preprinted, design bearing waxed sheets to elongated, cylindrical, solid wax candle bodies or the like which permits gravure or lithographically applied halftone and shaded design images to be used as candle decorations, eliminates costly and tedious manual operations characteristic of decal applications and other prior methods and devices, and produces a finished candle having perfectly aligned decorative images thereon which are not susceptible to undesirable torching as the candle burns. The method comprises applying a design-bearing, waxed sheet to the candle body in closely conforming relationship thereto while the latter rotates in pressurized, bridging engagement between a pair of spaced, adjacent, rotating transfer rollers.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: August 10, 1976
    Assignee: Hallmark Cards, Incorporated
    Inventors: Merlin M. Meisner, Raymond M. Matulis, James R. Mackey
  • Patent number: 3969131
    Abstract: Composite members comprising a substrate of fine grained istropic graphite having a density of at least about 1.75 gr/cc, a coefficient of thermal expansion of from about 7.5 to 8.3 inch per inch per .degree.C.times.10.sup.-.sup.6, in which the grains are of a maximum particle size of less than 0.001 inch, and characterized by a relatively uniform distribution of many interconnected fine pores of an average diameter of about 5 microns and less, the pores extending to the surface of the member, and a selected refractory meatal carbide coating firmly bonded to and conforming to the surface of the isotropic graphite member, the refractory metal carbide coating and the isotropic graphite having closely matching coefficients of thermal expansion. Such coated members are particularly well suited for use as anodes and other electrical members, particularly for use at elevated temperatures. Rotating anodes for X-ray tubes comprising such members are an application.
    Type: Grant
    Filed: July 24, 1972
    Date of Patent: July 13, 1976
    Assignee: Westinghouse Electric Corporation
    Inventors: Elmer G. Fatzer, Cody P. Murphree
  • Patent number: 3969549
    Abstract: A method of deacidifying paper wherein the paper has a substantially cellulose fiber base or substrate by exposing the paper to the vapors of a volatile organometallic compound and subsequently decomposing said compound to a base or alkaline material in situ. The treated material is usually first dried in vacuo and exposed under anhydrous or nearly anhydrous conditions to the organic-metallic compound. The method has the advantage of being able to treat large quantities of material at any one time.
    Type: Grant
    Filed: December 24, 1974
    Date of Patent: July 13, 1976
    Assignee: The United States of America as represented by the Librarian of Congress
    Inventors: John C. Williams, George B. Kelly, Jr.
  • Patent number: 3967025
    Abstract: A magnetic recording material formed from a base film of a crystalline polymer and having a magnetic layer coated on one surface of the base film which is sufficiently smooth to prevent the occurrence of dropout and the other surface of the film being finely rugged to thereby impart good running property to the magnetic recording material.
    Type: Grant
    Filed: June 28, 1974
    Date of Patent: June 29, 1976
    Assignee: Teijin Limited
    Inventors: Takashi Tanabe, Tomio Adachi
  • Patent number: 3962493
    Abstract: A method of making an ironer roll cover which comprises impregnating a less than full-width longitudinal portion of a sheet of fabric with a liquid thermosetting resin and curing the resin. The unimpregnated portion of the fabric acts as a liner or padding for the impregnated portion, while the impregnated portion serves as the work-contacting surface. Because the liner portion and the work-engaging portion of the cover are integrally formed from a single sheet of fabric, no seam or stitching is required for joining the two portions. Thus, the unevenness caused by a seam is eliminated and manufacturing costs are reduced. In a preferred embodiment, liquid water is applied in a narrow band between the impregnated and unimpregnated sections of the fabric to achieve a less than full impregnation, thereby providing a transitional zone between the liner and the work-contacting portion of the cover.
    Type: Grant
    Filed: November 2, 1973
    Date of Patent: June 8, 1976
    Assignee: Uniroyal Inc.
    Inventors: Sidney M. Faress, Dallas C. Thomas
  • Patent number: 3958066
    Abstract: Thermoplastic synthetic polymer fibers having powder of metal attached to the surface of the fibers are subjected to a treatment for increasing the oxidation number of said metal from zero to a plus value, that is, oxidation in a broad sense. The resulting conductive synthetic fibers support a layer of a compound of the metal, i.e. an oxidized product of the metal in a broad sense, firmly and undetchably thereon, and have as low an electric resistivity as 10.sup.5 .OMEGA./cm or less. The conductive fibers can be blended to ordinary synthetic fibers to improve their antistatic property, or can be substituted for expensive metal fibers. The thermoplastic synthetic polymer fibers are sheath-core fibers wherein the sheath has a lower melting point than the core.
    Type: Grant
    Filed: May 31, 1973
    Date of Patent: May 18, 1976
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Kazuyoshi Imamura, Tatsuo Ishikawa, Tetsuhiro Kusunose
  • Patent number: 3949107
    Abstract: A method of forming a bright-drying floor finish on a resilient flooring comprising applying a polish containing an aqueous dispersion of fine particles of a resin with a Tg of 30.degree. to 80.degree.C to a flooring, preferably a resilient flooring, with at least one of said polish or said flooring having been preheated to a temperature above the glass transition (Tg) temperature of said resin, and drying said polish to produce said bright-drying floor finish.
    Type: Grant
    Filed: May 31, 1974
    Date of Patent: April 6, 1976
    Assignee: Liggett & Myers Incorporated
    Inventors: Daniel Schoenholz, Herbert Terry
  • Patent number: 3949124
    Abstract: There are provided novel antistatic carpet yarns and carpets as well as novel compositions of matter and methods for the chemical treatment of carpet yarns and carpets in order to impart to such textile materials substantially durable hydrophilic, soil-repellency and antistatic properties that will be retained despite rigorous exposure to washing, foam, vacuum and steam cleaning, and wear under high compression loads (or foot-traffic), without any adverse effect on dyestuffs or flammability. The method consists essentially in first treating the carpet yarn or carpet made of preferably synthetic fiber material (by such per se well known methods as padding, spraying or transfer-roll) with an aqueous emulsion which forms a normally solid coating consisting essentially of:A. at least one phase of an alkylphenol which is insoluble in water and which is dissolved in an alcohol, a ketone, or other organic solvent;B.
    Type: Grant
    Filed: July 12, 1974
    Date of Patent: April 6, 1976
    Assignee: HCA-Martin, Inc.
    Inventor: Dara Ardeshir Jilla
  • Patent number: 3949106
    Abstract: A material having a vapor pressure of at least 5 mm Hg at 490.degree.C. and selected from aromatic and cycloaliphatic hydrocarbons and alkyl derivatives thereof, nitrogen-, oxygen- and sulfur-containing compounds having hetero rings and alkyl derivatives thereof, substituted compounds of these compounds, and substances containing these compounds is used as starting material. Such starting material is brought into contact in a vapor state, if necessary, diluted with an inert gas, with a substrate heated at a temperature of 600.degree.-1500.degree.C. thereby depositing the resulting isotropic pyrolytic carbon on the substrate.
    Type: Grant
    Filed: February 19, 1974
    Date of Patent: April 6, 1976
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Tadashi Araki, Kiro Asano, Jun Yamada, Hisao Imaizumi, Takao Awao
  • Patent number: 3930963
    Abstract: Radiant energy imaged printed circuit boards are provided by treating an insulating base with a composition of a reducible metal salt and a radiant energy sensitive compound, exposing the treated base to radiant energy in selected areas to produce metallic nuclei in the form of a non-conducting real image of the desired circuit pattern, rinsing the exposed base to remove unexposed metal salts and exposing the real image to an electroless metal bath to build up conductor lines of electroless metal thereon. In an alternative procedure, conductor lines are built up by electroplating with the same or a different metal and, optionally, solder coating.
    Type: Grant
    Filed: February 11, 1972
    Date of Patent: January 6, 1976
    Assignee: Photocircuits Division of Kollmorgen Corporation
    Inventors: Joseph Polichette, Edward J. Leech