Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4943611 | Resin composition for spacers of information recording disc A resin composition for spacers of an information recording disc which comprises: (A) a random copolymer of ethylene and at least one cycloolefin having an intrinsic viscosity [η] of from 0.05 to 10 dl/g, as measured in decalin at a temperature of 135° ... | 07/24/1990 |
| 4639908 | High density information records made of conductive resin compositions comprising inorganic power stabilizers High density information records made of vinyl chloride resin compositions which comprise conductive powder and inorganic compounds in the form of powder having an antacidic action and a predetermined average size. By this, dropout defects in the informat... | 01/27/1987 |
| 4631717 | High density information records of an electrostatic capacitance type High density information records formed from conductive resin compositions which comprise a graft polymer obtained by subjecting vinyl chloride monomer to graft polymerization with a copolymer of ethylene and vinyl acetate having a content of vinyl acetat... | 12/23/1986 |
| 4592861 | Antistatic thermoplastic composition comprising a graft polymer, halogenated thermoplastic polymer and conductive carbon black An antistatic thermoplastic composition comprising a blend of a thermoplastic graft polymer; a thermoplastic halogenated polymer; and an amount of conductive carbon black effective to cause the composition to have a surface resistivity of 102 -... | 06/03/1986 |
| 4582863 | Polymer concentrate containing an antistatic agent, process for the production thereof and the use thereof A polymer concentrate containing an antistatic agent and a process for the production thereof are provided, in which the antistatic agent is applied to the particle surface of a finely divided polymer powder. The thus obtained concentrate is suitable for ... | 04/15/1986 |
| 4569962 | Perfluoropolyether compositions which are soluble in non-fluorinated solvents Polymeric compositions are provided in which perfluoropolyethers have been solubilized in non-fluorinated solvents by combining them with a solubilizing agent such as azotic conjugated compounds, and phosphorylated compounds. Typical of the perfluoropolye... | 02/11/1986 |
| 4558087 | Vinyl chloride resin composition for production of hard articles A vinyl chloride resin composition for production of hard articles. The composition comprises 100 parts by weight of a graft polymer and not more than 40 parts by weight of electrically conductive carbon black. The graft polymer is obtained by polymerizin... | 12/10/1985 |
| 4548739 | High density information records made of conductive resin compositions comprising a specifically-treated vinyl chloride-base resin A high density information record of the electrostatic capacitance type comprising a record substrate on which signal information is recorded as geometric variations. The record substrate is made of a conductive resin composition comprising a vinyl chlori... | 10/22/1985 |
| 4515830 | Solvent-cast capacitive high density information disc Sandwich-type capacitive electronic discs having thin conductive layers are prepared by adding a thermally processed conductive molding composition comprising a thermoplastic resin, conductive carbon black particles and suitable additives to a suitable so... | 05/07/1985 |
| 4515843 | Disc-shaped information carrier having a high storage density A disc-shaped information carrier produced by thermoplastic deformation comprising a pressed mass including a co-polymer of vinyl chloride having additives incorporated therein. The carrier has hygroscopic properties and relief-like surface portions which... | 05/07/1985 |
| 4472295 | Conductive molding composition and discs therefrom A high density capacitive information disc recording medium fabricated from a conductive plastic molding composition including a moldable plastic and conductive carbon black particles having a volatiles content at 950° C. of less than about 1 percent.... | 09/18/1984 |
| 4465615 | Electroconductive resin composition and a videodisc record An electroconductive resin composition is a blend of 5-30% by weight carbon black and a graft-polymer. The graft-polymer is obtained by graft polymerizing 99-76 parts by weight of monomeric vinyl chloride to 1-15 parts by weight of an ethylenevinyl acetat... | 08/14/1984 |
| 4430460 | Process for preparing conductive PVC molding compositions Low density conductive carbon black agglomerated particles are finely divided to a particle size below 0.044 millimeter and added in a portionwise manner to a PVC resin in a closed system. The process ensures a uniform dispersion of the carbon black into ... | 02/07/1984 |
| 4412941 | Recording disc compositions comprising polymers of monovinyl-substituted hydrocarbons, conductive carbon black and lubricants Electrically-conductive compositions comprising about 65-85 weight percent of a resin component based on conjugated alkadienes having 4 to 8 carbon atoms and monovinyl-substituted arenes having 8 to 12 carbon atoms, with 10-30 weight percent extra-conduct... | 11/01/1983 |
| 4396660 | Electroconductive resin composition and a videodisc record An electroconductive resin composition is a blend of 5-30% by weight of carbon black and a graft-polymer. The graft-polymer is obtained by graft-polymerizing 99-76 parts by weight of monomeric vinyl chloride to 1-15 parts by weight of an ethylene-vinyl ac... | 08/02/1983 |
| 4384055 | Hard vinyl chloride resin composition for information signal recording media A hard vinyl chloride resin composition for information signal recording media, said composition consisting essentially of (A) 100 parts by weight of a copolymer having a specific viscosity of 0.16 to 0.31 and composed of 75 to 99% by weight of vinyl chloride,... | 05/17/1983 |
| 4378310 | Conductive molding composition An improved molding composition having a high thermal stability, including a vinyl chloride/vinyl acetate copolymer-based resin, sufficient finely divided conductive particles to obtain the desired conductivity, and from 3 to 20 weight percent of the modi... | 03/29/1983 |
| 4349385 | Method of preparing a FeOOH pigment The invention relates to a method of manufacturing an improved pigment of FeOOH particles. The starting material is an acidic or alkaline aqueous dispersion of FeOOH particles which has been manufactured according to known methods. According to the invent... | 09/14/1982 |
| 4299736 | Conductive molding composition and discs therefrom Polyvinyl chloride base molding compositions containing conductive carbon particles which have been treated with a fatty acid chloride have reduced melt viscosities, improved processabilities, and increased electrical conductivities, as well as improved d... | 11/10/1981 |
| 4283315 | Gramophone record composition Gramophone records are prepared from a vinyl polymer composition containing a fatty acid soap of an alkaline earth metal or zinc, sugar or polyol fatty acid esters and fatty acid mixed glycerides and is free of heavy metal ions.... | 08/11/1981 |
| 4280941 | Video discs and molding compositions therefor A polyvinyl chloride based molding composition containing polymer grafted conductive carbon particles has good processability, low heat distortion temperature and good dispersion of the conductive particles and can be molded to form video discs of improve... | 07/28/1981 |
| 4241120 | Video discs and molding compositions therefor A polyvinyl chloride based molding composition containing polymer grafted conductive carbon particles has good processability, low heat distortion temperature and good dispersion of the conductive particles and can be molded to form video discs of improve... | 12/23/1980 |
| 4228050 | Conductive molding composition An improved molding composition having a bulk resistivity below about 500 ohm-cm at 900 megahertz for compression molding video discs comprising sufficient conductive carbon black particles to obtain the desired conductivity, from about 1.5 to 4 percent b... | 10/14/1980 |
| 4176104 | Polystyrene phonograph record injection molding compositions of improved transparency Phonograph record molding compositions having polystyrene as the major constituent are formulated to have wear resistance properties superior to other polystyrene injection molded compositions while generally retaining the transparency of unmodified polys... | 11/27/1979 |
| 4151132 | Molding composition An improved molding composition for compression molding non-coated video discs containing about 12-20 percent of conductive carbon black particles, about 10 percent of a vinyl chloride-vinyl acetate copolymer, about 10 percent of a vinyl chloride-maleate ... | 04/24/1979 |
| 4129536 | Vinyl chloride based injection molding composition A vinyl chloride based injection molding composition comprises a vinyl chloride-propylene copolymer, a mercapto tin stabilizer, an acrylic processing aid and an ester wax lubricant. This composition has excellent flow characteristics and can form molded a... | 12/12/1978 |
| 4125654 | Information signal recording disc A phonograph or video disc comprises at least one unsaturated nitrile copolymer and has therein an unsaturated nitrile content of from 40 to 90 percent by weight, and the disc exhibits a Clash-Berg flex temperature of from 50° to 120° C, an absorbed imp... | 11/14/1978 |
| 4088617 | Phonographic record molding composition A phonograph record molding composition formed by copolymerizing a vinyl aromatic monomer with an acrylic ester monomer in the presence of one or more waxes which composition is especially suitable for injection and compression molding and which is charac... | 05/09/1978 |
| 3975321 | Sound reproduction compositions Novel sound reproduction molding compositions of good processing qualities are disclosed, based on copolymer of vinyl chloride and propylene. Records obtained therefrom, have good audio qualities and resistance to impact, thermal warpage and water blister... | 08/17/1976 |
| 3960790 | Disc record and method of compounding disc record composition A method of making a disc record molding composition by compounding a copolymer of vinyl chloride-vinyl acetate and a homopolymer of vinyl chloride, with carbon black, a resin stabilizer, a resin plasticizer, an antistatic agent and a mold release agent i... | 06/01/1976 |
| 3957917 | Resin composition for shaping information carrier A composition for molding information carriers, such composition consisting of a uniformly kneaded mixture of (I) 100 parts by weight of a composite resin having a specific viscosity of 0.16 to 0.40 composed uniformly of (A) 90 to 40% by weight of a vinyl... | 05/18/1976 |
| 3942996 | Radiation sensitive recording material A radiation sensitive recording material contains a layer of a layer-forming substance and incorporated therein an organic halogen compound capable of producing hydrogenhalide when struck by high energy radiation, and a chromogenic arylvinyl pyran or aryl... | 03/09/1976 |
