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| Number | Title | Issue Date |
| 5108914 | Process for the synthesis of L-alpha-amino acids Microorganisms with the ability to cleave enantioselectively 5-substituted hydantoins to L-alpha-amino acids are cultivated in a known manner in a batch preparation. By one-time dosage of anondegradable enzyme inductor of the structure ##STR1## ... | 04/28/1992 |
| 5013591 | Building sheeting and method of its manufacture A bituminous building sheeting which is compatible with hot mopping bitumen and bituminous cold adhesives and whose covering mass is modified with APP and IPP. The mass, homogenized under high shear forces is cooled off after the application of 180° to 2... | 05/07/1991 |
| 4897443 | Polysulfide sheeting Polysulfide sheeting is prepared by mixing a curable polysulfide oligomer or polymer, carbon black, and manganese dioxide as a hardening catalyst; forming the composition into a sheet; and curing the sheet at an elevated temperature. The sheeting has unus... | 01/30/1990 |
| 4780362 | Bituminous roofing strip A roofing strip with a very wide range of plasticity and based on elastomer-modified bitumen is prepared by covering a support with a bitumen/rubber mixture in the ratio of 17/3-19/1 and irradiating the strip at a rate between 6 and 16×104 Gy.... | 10/25/1988 |
| 4701478 | Radiation cross-linkable binding agents Radiation cross-linkable binding agents formed by reacting first an epoxy component with more than one epoxy group per molecule with at least one carboxylic acid in a molar ratio 1 of epoxy group per 0.5 to 0.9 carboxyl groups and second reacting the said... | 10/20/1987 |
| 4634723 | Furfuryl alcohol binders, methods for their production and use A binder material is disclosed formed from furfuryl alcohol suitable for the preparation of molded bodies and cores for molding for the foundry industry based on the following composition: 40-60 weight percent higher molecular weight furfuryl alcohol formaldeh... | 01/06/1987 |
| 4618521 | Corrosion protection sheet A corrosion protective sheet for adhesion to steel sheets which is made from elastomers and natural resin modified bitumen and which contains up to about 10% organic and or inorganic fibrous material. The sheet is coated on the underside with a melt adhes... | 10/21/1986 |
| 4598138 | Stable, phenolic modified hydrocarbon resins for leucopigments Stable phenolic-modified hydrocarbon resins with an OH number which is 4.5 or greater are resonably priced and toxicologically generally regarded as safe resins for the development of leucopigments, especially for the development of colors in pressure sen... | 07/01/1986 |
| 4587291 | Multicomponent aqueous resole binder with extended processability time Binders are described based on acid curing phenol resins and acid curing agents which, after mixing, have an extended processability time but nevertheless exhibit a rapid curing time at relatively low temperatures. They are obtained by using, as the resin... | 05/06/1986 |
| 4582591 | Process for the separation of resinous substances from coal-base heavy oils and use of the fraction obtained Heavy oil derived from coal is diluted with organic solvent to a content of less than 10 weight percent of toluene-insoluble material. The mixture is then mixed with a non-aromatic solvent in a ratio of 1:3 to 5:1. With slow stirring of the heavy phase at... | 04/15/1986 |
| 4582910 | Method for preparation of 4-halogenonaphthalic acid anhydrides A method for the preparation of 4-halogenonaphthalic acid anhydrides by halogenation of an aqueous solution of an alkali salt of the naphthalic acid with halogen or alkali metal hypohalogenite wherein a solution of the alkali metal salt of the naphthalic ... | 04/15/1986 |
| 4568727 | Storage stable, heat curable mixtures of epoxy resins and method for preparing same Storage stable, heat curable mixtures obtained from epoxy resins as a binder system containing latent hardening agents as well as fillers and additive materials which have outstanding mechanical and electrical properties and which are obtained as epoxy re... | 02/04/1986 |
| 4567272 | Pyrrole containing 2-aminonitropyridine derivatives New 2-aminonitropyridine derivatives are disclosed of the formula: ##STR1## wherein the nitro group is in the 3- or 5-position and X represents hydrogen, an alkoxy group with 1 to 3 C atoms or an unsubstituted or alkyl- or hydroxyalkyl substituted am... | 01/28/1986 |
| 4546190 | Method for producing 3,5,6-trichloro-1H-pyridine-2-on The compound 3,5,6-trichloro-1H-pyridine-2-on can be produced in technical quantities by passing chlorine gas into the gas space above a solution of 6-chloro-1H-pyridine-2-on in an aqueous carboxylic acid solution and maintaining the reaction temperature ... | 10/08/1985 |
| 4539388 | Acid-modified, aromatic hydrocarbon resins and method for their production Aromatic hydrocarbon resins are disclosed prepared from aromatic, unsaturated hydrocarbons and a melted aromatic carboxylic acid polymerized in the presence of a Friedel-Crafts catalyst. The resin may be used in printing inks, for paper sizing, for coatin... | 09/03/1985 |
| 4534949 | Process for the manufacture of molded carbon bodies A process for the manufacture of molded carbon bodies directly from high-boiling aromatic hydrocarbon fractions derived from coal or mineral oil, without additional binding agents and without using high pressures, is disclosed. Molds are filled with the s... | 08/13/1985 |
| 4523016 | Process for the catalytic dehydrogenation of piperidine The catalytic dehydrogenation of piperidine to pyridine in the gas phase using hydrogen as the carrier gas is carried out with a silicon dioxide carrier activated with copper, nickel and chromium as the catalyst, the metals copper, nickel and chromium bei... | 06/11/1985 |
| 4510090 | Method for the production of phenanthrenequinone Improvement of the yield and purity of phenanthrenequinone during its production by oxidation of phenanthrene by means of chromic acid in a sulfuric acidic medium is achieved by preparing a dispersion made up of phenanthrene, alkali dichromate and water a... | 04/09/1985 |
| 4473606 | Foils An anticorrosion perforated foil for fusion onto metal substrates comprising 60 to 90% by weight of bitumen, 0.5 to 7% by weight of styrene-butadiene rubber, 5 to 25% by weight of a bitumen modified with polymers, 0.5 to 7.5% by weight of natural resin an... | 09/25/1984 |
| 4471106 | Phenol-modified hydrocarbon resins with a high OH-number, method for the preparation thereof Phenolic-modified hydrocarbon polymers with a high OH-number yet with excellent compatibility with non-polar solvents are suitable for preparing adhesives and coating materials. The polymers are obtained by isothermal, catalytic copolymerization of: 30-40... | 09/11/1984 |
| 4444650 | Process for coking high-boiling aromatic hydrocarbon mixtures to form carbon materials having constant properties Disclosed is a continuous or discontinuous process for coking high-boiling aromatic hydrocarbons to form high grade carbon products having only a narrow range of variation of physical and chemical properties. High-boiling aromatic hydrocarbon mixtures are... | 04/24/1984 |
| 4430175 | Process for the electrochemical conversion of coal and use of the reaction products Ground coal is dispersed in an aqueous electrolyte and is alternately oxidized anodically and reduced cathodically. The reaction gases and the liquid hydrocarbons obtained and other volatile organic compounds are processed and used in the customary manner... | 02/07/1984 |
| 4430193 | Process for dissolving coal in hydrocarbon mixtures A process is described for bringing ground coal or similar carbon-containing raw materials into solution with aromatic solvents under elevated pressure and at elevated temperature. The solvents used are high-aromatic residues obtained from the pyrolysis o... | 02/07/1984 |
| 4430194 | Method for the production of a highly aromatic pitch-like coal by-product An improvement in the method for the production of a highly aromatic pitch-like coal by-product by dissolving comminuted coal or similar solid carbon-containing raw materials with aromatic solvents at elevated temperature is disclosed wherein the solid ma... | 02/07/1984 |
| 4429172 | Process for the production of modified pitches and low boiling aromatics and olefins and use of said pitches A process for the preparation of modified pitches and low boiling aromatics and olefins is described. Waste plastic which consists of polymeric chains of olefins is subjected to a thermal treatment in the presence of high boiling aromatics. The modified p... | 01/31/1984 |
| 4427526 | Process for the production of hydrogenated aromatic compounds and their use A process is disclosed for the production of hydrogenated aromatic compounds and mixtures thereof by thermal treatment of aromatic oils or mixtures, derived from coal or petroleum, wherein the improvement over the prior art resides in thermally treating a... | 01/24/1984 |
| 4425389 | Heat-applicable and hardenable sealing compositions and its use A polysulfide sealing composition is described which contains, in addition to the hardening agents and optional fillers, softeners and other conventional additives, a mixture of a solid polysulfide rubber with terminal SH groups and a liquid polysulfide p... | 01/10/1984 |
| 4415429 | Process for the preparation of highly aromatic pitchlike hydrocarbons A process for the production of a highly aromatic pitch-like hydrocarbon by disintegration of comminuted coal or similar carbonaceous raw material with hydrocarbon mixtures as solvent at elevated temperature and pressure.... | 11/15/1983 |
| 4414192 | Method of producing a highly reactive pitch fraction and its usage A method of producing a highly reactive pitch fraction is disclosed. Coal-tar pitch is extracted with hot chloroform and the pitch solution treated with solid iodine. The solid reaction products are separated and, in the presence of chloroform, decomposed... | 11/08/1983 |
| 4385002 | Monoaryl thallium III perchlorates and their preparation A process for the preparation of monoaryl thallium III perchlorates substantially free of isomers comprising reacting at atmospheric pressure at 0° to 80° C. thallium III perchlorate, 1 to 6 moles of a carboxylic acid, 1 to 6 moles of an aromatic compou... | 05/24/1983 |
| 4384082 | Polymerization process In a process for the polymerization of unsaturated aromatic hydrocarbons with BF3 -etherate or BF3 -phenolate as the polymerization catalyst, the improvement comprising using BF3 -alcoholates as a co-catalyst.... | 05/17/1983 |
| 4384054 | Asbestos-free friction material An asbestos-free friction material useful for brake linings, clutches, etc. comprising 5 to 25% by weight of a hardenable binder or binder mixture, a reinforcing fibrous material and conventional fillers, abrasives and lubricants the said reinforcing mate... | 05/17/1983 |
| 4380454 | Coking quality of coals with insufficient coking properties Upgrading coke quality of coals by adding a pitch-like product with a softening point (K-S) of 90°-160° C. to the coal. The additive is obtained by treating finely divided coal or other carbon containing raw material with hydrocarbon solvents derived fr... | 04/19/1983 |
| 4379133 | Process for anisotropic carbon production An improved process for treating coal tar pitch to form anisotropic carbon comprising treating coal tar pitch with picric acid, recovering the resulting picrates, decomposing the picrates and heating the resulting aromatic hydrocarbons to obtain anisotrop... | 04/05/1983 |
| 4377699 | 5-Chloro-indole preparation An improved process for the preparation of 5-chloro-indole comprising reacting indoline in a chlorine-inert organic solvent with an acylating agent of an organic carboxylic acid to obtain the corresponding 1-acyl-indoline, reacting the latter in the prese... | 03/22/1983 |
| 4377040 | Process for the modification of wood A process is described for the modification of wood and wood products by heat treatment in a closed, heatable vessel, wherein the water content of the starting material is controlled to be no higher than 10% by weight.... | 03/22/1983 |
| 4373038 | Asbestos-free friction material An asbestos-free friction material useful for brake linings, clutches, etc. comprising 5 to 25% by weight of a hardenable binder or binder mixture, 1 to 70% by weight of a reinforcing fibrous material and conventional additives, the said reinforcing mater... | 02/08/1983 |
| 4357277 | Novel process for the preparation of N,N'-bisacyl hydrazides An improved process for the preparation of acyl hydrazides of the formula ##STR1## wherein A and B individually are a group of the formula ##STR2## wherein R1 is selected from the group consisting of hydrogen and alkyl of 1 to 4 carbo... | 11/02/1982 |
| 4357472 | Process for the production of thionaphthene from thionaphthene sulfonic acid A process for the production of thionaphthene by dissociation of thionaphthene sulfonic acid such as obtained, for example, in the partial sulfonation of naphthalene fractions of coal tar, characterized in that the density of the reaction mixture is maint... | 11/02/1982 |
| 4339328 | Process for the production of high grade carbonaceous binders A process is described for the production of high grade carbonaceous binders, wherein an aromatic high grade carbonaceous material is produced from 5-40% by weight of reduced or low ash coal or similar carbon containing raw materials by treatment with 20-... | 07/13/1982 |
