Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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 |
| 5130243 | Process for production of starch sugar Process for producing starch sugar which comprises contacting liquefied starch with amylase immobilized onto porous chitosan. Immobilized debranching enzyme can be used in combination with the amylase. The debranching enzyme is immobilized onto a specific... | 07/14/1992 |
| 4957868 | Cylindrical hollow carriers for microorganisms made of nonwoven fabric A cylindrical hollow carrier for microorganisms is prepared by subjecting a nonwoven fabric having a specific gravity of not greater than 1.0 to a surface smoothing treatment at an elevated temperature of 200° to 450° C., then pressing with a roller to ... | 09/18/1990 |
| 4931263 | Wet-process stack gas purification method A wet-process stack gas purification method and apparatus wherein stack gas is scrubbed by bubbling it into a first scrubbing liquid while maintaining the level of the first scrubbing liquid. The above scrubbed gas is subjected to a counter-current contac... | 06/05/1990 |
| 4909923 | Method for hydrogenation of coal tar pitch A method for the hydrogenation of coal tar pitch which comprises subjecting said coal tar pitch containing toluene insolubles to slight hydrogenation in the presence of a hydrogenation catalyst having carried on a refractory inorganic oxide carrier at lea... | 03/20/1990 |
| 4765960 | Apparatus for installing pipe in multipipe type gas-liquid contact equipment Apparatus for installing pipes in multipipe type gas-liquid contact equipment comprises a bush which can be mounted on the inner peripheral surface of a pipe installation bore formed in a deck for pipe installation within the multipipe type gas-liquid con... | 08/23/1988 |
| 4562059 | Method of preparing alumina An improved method of preparing alumina, including a first stage in which an alumina hydrogel is formed from seed aluminum hydroxide, and a second stage in which the alumina hydrogel is processed for conversion into alumina. The improvement is in the firs... | 12/31/1985 |
| 4555394 | Process for the preparation of alumina An improved process for the preparation of alumina, including forming an alumina hydrogel from aluminum hydroxide, and processing the alumina hydrogel into alumina. The improvement involves the alumina hydrogel forming step which is connected in the prese... | 11/26/1985 |
| 4530754 | Process for the conversion of heavy hydrocarbon oils into light hydrocarbon oils Heavy hydrocarbon oils are converted into light hydrocarbon oils by two-stage process wherein, in the first stage, a heavy hydrocarbon oil is subjected to thermal cracking conditions and, in the second stage, the product of the thermal cracking is subject... | 07/23/1985 |
| 4530753 | Method of converting heavy hydrocarbon oils into light hydrocarbon oils Heavy hydrocarbon oils are converted into light hydrocarbon oils by two-stage process wherein, in the first stage, a heavy hydrocarbon oil is subjected to thermal cracking conditions and, in the second stage, the product of the thermal cracking is subject... | 07/23/1985 |
| 4525267 | Process for hydrocracking hydrocarbons with hydrotreatment-regeneration of spent catalyst A process for hydrocracking hydrocarbons for residuum conversion in the presence of a fluidized catalyst, which is characterized by extracting at least part of the fluidized catalyst from the reaction system as a spent catalyst, subjecting at least part o... | 06/25/1985 |
| 4486295 | Processing heavy hydrocarbon oils Heavy hydrocarbon oils are processed by hydrotreatment over a sepiolite supported metal catalyst, described fuller in U.S. Pat. No. 4,152,250, whereby metallic impurities are removed from the oil and its asphaltene content is decreased, and the hydrotreat... | 12/04/1984 |
| 4454038 | Apparatus for biological treatment of waste water in downflow operation An improvement in an apparatus for continuous biological treatment of waste water including a reactor having a feeding pipe and a distribution pipe at the top thereof for introducing waste water into the reactor, and a withdrawing pipe at the bottom there... | 06/12/1984 |
| 4444655 | Hydrotreatment of heavy hydrocarbon oils containing asphaltenes, and catalysts therefor A catalyst for hydrotreating a heavy hydrocarbon oil containing asphaltenes comprises a porous carrier composed of one or more inorganic oxides of at least one element selected from among those of Groups II, III and IV of the Periodic Table, and at least ... | 04/24/1984 |
| 4440631 | Process for hydrocracking heavy hydrocarbon oils and catalyst therefor A catalyst for hydrocracking heavy hydrocarbon oils includes a porous inorganic carrier composed mainly of alumina or titania, and two or more catalytic metal components composited with the carrier. The metals of the catalytic metal components are either ... | 04/03/1984 |
| 4424142 | Catalyst for hydrotreatment of heavy hydrocarbon oils A catalyst for the hydrotreatment of heavy hydrocarbon oils, which is prepared by supporting more than 2% by weight of VSx, wherein x represents about 1.1-1.59 in terms of an atomic ratio of S/V, on a substrate composed of a clay mineral which ... | 01/03/1984 |
| 4422960 | Catalysts for hydrotreatment of heavy hydrocarbon oils containing asphaltenes A catalyst for hydrotreating a heavy hydrocarbon oil containing asphaltenes comprises a porous carrier composed of one or more inorganic oxides of at least one element selected from among those of Groups II, III and IV of the Periodic Table, and at least ... | 12/27/1983 |
| 4399026 | Process for hydrotreating heavy hydrocarbon oils, catalysts therefor, and a method of preparing such catalysts A catalyst for hydrotreating heavy hydrocarbon oils comprises a carrier which is a calcined composite of a mixture of a clay mineral consisting mainly of magnesium silicate having a double-chain structure and at least one oxide-forming substance selected ... | 08/16/1983 |
| 4368060 | Gas sparging method This invention is directed to a sparging method wherein efficient gas-liquid contact is obtained without causing sloshing by introducing and dispensing gas into the liquid only through openings in the side wall of a specially designed sparger which has a ... | 01/11/1983 |
| 4367165 | Catalyst for hydrotreating heavy hydrocarbon oils and method of preparing same A catalyst for hydrotreating a heavy hydrocarbon oil comprises a carrier which is a calcined composite of a mixture of a clay mineral consisting mainly of magnesium silicate having a double-chain structure and a pseudoboehmite which shows a powder X-ray d... | 01/04/1983 |
| 4367164 | Catalysts for hydrotreating heavy hydrocarbon oils and a method of preparing such catalysts A catalyst for hydrotreating heavy hydrocarbon oils comprises a carrier which is a calcined composite of a mixture of a clay mineral consisting mainly of magnesium silicate having a double-chain structure and at least one oxide-forming substance selected ... | 01/04/1983 |
| 4340466 | Process for hydrotreating heavy oils containing metals A process for catalytically hydrotreating a heavy oil containing soluble metals in two steps at a temperature of 320° to 470° C. and a hydrogen pressure of 30 to 350 kg/cm2, wherein the oil is substantially desulfurized in the first step in t... | 07/20/1982 |
| 4326991 | Process for preparing a catalyst for hydrotreatment of heavy hydrocarbon oils A catalyst for the hydrotreatment of heavy hydrocarbon oils, which is prepared by supporting more than 2% by weight of VSx, wherein x represents about 1.1-1.59 in terms of an atomic ratio of S/V, on a substrate composed of a clay mineral which ... | 04/27/1982 |
| 4277451 | Wet process for the desulfurization of exhaust gas A wet process for the desulfurization of exhaust gas comprising the following operation steps so as to eliminate and recover sulfur dioxide from exhaust gas containing it: (A) a step of absorbing sulfur dioxide by contacting exhaust gas with an absorbent ... | 07/07/1981 |
| 4275162 | Process for the production of sphingomyelinase A process for the production of sphingomyelinase comprising cultivating a sphingomyelinase-producing microorganism, belonging to the genus Pseudomonas, in a culture medium and recovering sphingomyelinase from the culture medium.... | 06/23/1981 |
| 4256573 | Process for biological treatment of waste water in downflow operation This invention relates to biological treatment of waste water using a carrier floatable on water, and more particularly to a novel process for treatment of waste water utilizing a fluidized bed which is formed by supplying waste water in a downflow operat... | 03/17/1981 |
| 4246073 | Process of distillation of a multicomponent hydrocarbon mixture A process for distilling multicomponent hydrocarbon mixtures in which the relative volatility between the dominant component in the lightest product and the dominant component in the heaviest component is between 1.10 and 7. The hydrocarbon mixture is fed... | 01/20/1981 |
| 4233137 | Method of heat recovering from high temperature thermally cracked hydrocarbons A method for recovering sensible heat from a thermally decomposed high temperature hydrocarbon gas product in the form of high pressure steam of from 40 to 100 kg/cm2 has been discovered. This method comprises pre-cooling at first the thermally... | 11/11/1980 |
| 4216118 | Process for recovering vanadium accumulated on spent catalyst This invention relates to a process for selectively recovering vanadium from spent catalysts which were used in hydrodesulufurization, hydrodemetallization, etc. of heavy oils until metals in said heavy oils accumulated thereon. More particularly, it rela... | 08/05/1980 |
| 4196102 | Catalysts for demetallization treatment of _hydrocarbons supported on sepiolite This invention relates to a catalyst for hydrotreatment of hydrocarbons comprising one or more of metals selected from the group consisting of transition metals and metals of group IIb of the periodic table supported on sepiolite. More particularly it rel... | 04/01/1980 |
| 4191636 | Process for hydrotreating heavy hydrocarbon oil This invention relates to a process for continuously converting a heavy oil into an asphaltene-metal-free oil by hydrotreating said heavy oil to crack asphaltenes selectively and remove heavy metals such as vanadium and nickel from said heavy oil simultan... | 03/04/1980 |
| 4166026 | Two-step hydrodesulfurization of heavy hydrocarbon oil A process for hydrodesulfurization of heavy hydrocarbon oil containing asphaltenes and heavy metals in large amounts is disclosed. The heavy oil is hydrotreated in a continuous 2-step process. In the first step the heavy oil is subjected to hydrodemetalli... | 08/28/1979 |
| 4165348 | Apparatus for fuel supply to spark ignition type internal combustion engine In a fuel supply apparatus and method for a spark ignition type of internal combustion engine, a variable throttle is provided in a bypass between the discharge side and the suction side of a volume type fuel pump. The variable throttle is regulated by a ... | 08/21/1979 |
| 4156712 | Gas-liquid contacting method A method for removing sulfur dioxide from flue gases by simultaneous absorption and oxidation in an aqueous absorbent. An enclosed body of an aqueous liquid absorbent for the sulfur dioxide is provided and the flue gas is sparged into an upper portion of ... | 05/29/1979 |
| 4152250 | Demetallation of hydrocarbons with catalysts supported on sepiolite This invention relates to a catalyst for hydrotreatment of hydrocarbons comprising one or more of metals selected from the group consisting of transition metals and metals of group IIb of the periodic table supported on sepiolite. More particularly it rel... | 05/01/1979 |
| 4120780 | Catalysts for hydrodemetallization of hydrocarbons containing metallic compounds as impurities and process for hydro-treating such hydrocarbons using such catalysts A catalyst obtained by admixing red mud with alumina or/and an alumina-containing substance, optionally adjusting the water content of the admixture and/or adding an organic binder to the admixture, kneading and shaping the admixture into pellets having s... | 10/17/1978 |
| 4099925 | Apparatus for desulfurization of flue gas A single-vessel apparatus for desulfurization of flue-gas containing gaseous sulfurous acid, in which the flue gas is contacted with an absorption liquid to thereby have the sulfurous acid content in the flue gas absorbed by said absorption liquid and, at... | 07/11/1978 |
| 4094380 | Multi layer sound-proofing structure A multi layered sound-proofing structure comprises: a first layer comprising a light aggregate and a binder and having a bulk density of from 0.1 to 2.0 g/cm3 and void fraction as continuous void of from 15 to 60%; a second layer of a material ... | 06/13/1978 |
| 4085034 | Method for the thermal cracking of heavy hydrocarbon In a process for the thermal cracking of a heavy hydrocarbon in a cylindrical reactor, a portion of the content material in the reactor is taken out and injected back into the reactor according to a specific procedure to form a "wet wall" or liquid curtai... | 04/18/1978 |
| 4075125 | Catalysts for hydrodemetallization of hydrocarbons containing metallic compounds as impurities A catalyst obtained by admixing red mud with alumina or/and an alumina-containing substance, optionally adjusting the water content of the admixture and/or adding an organic binder to the admixture, kneading and shaping the admixture into pellets having s... | 02/21/1978 |
| 4011298 | Method for simultaneous removal of SOx and NOx Waste gas containing sulfur oxide (SOx) and nitrogen oxide (NOx) is mixed with an ozone-containing gas to have the value x of NOx fall in the range of 1.2 to 2.5 and thereafter brought into contact with an aqueous solution... | 03/08/1977 |
