Famous Patents
The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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 |
| 6398922 | Photochemical gas-liquid process for halogenating alkylbenzenes The invention provides a process for carrying out a photochemical gas-liquid process for halogenating alkylbenzenes, the process being carried out in a photochemical gas-liquid reactor comprising a vessel, a central source of radiation, a gas distributor,... | 06/04/2002 |
| 6288290 | Method for production of halogen-containing aromatic compound This invention relates to a method for the production of an aromatic compound (II) having a (CH2)n CX2 Br group (wherein X represents a fluorine or chlorine atom and the X's may be same or different, and n is an integer in... | 09/11/2001 |
| 6265628 | Process for the continuous preparation of mono- and/or bis(mono-and/or di-and/or trichloromethyl) benzenes In a process for the continuous preparation of mono- and/or bis(mono- and/or di- and/or trichloromethyl) benzenes by gradual chlorination of the corresponding mono-or dimethylbenzenes in several reactors in cascade, the first reactor has a greater volume ... | 07/24/2001 |
| 6245200 | Photo-oxidation method using MoS2 nanocluster materials A method of photo-oxidizing a hydrocarbon compound is provided by dispersing MoS2 nanoclusters in a solvent containing a hydrocarbon compound contaminant to form a stable solution mixture and irradiating the mixture to photo-oxide the hydrocarb... | 06/12/2001 |
| 6179970 | Process for the preparation of fluoro compounds from the corresponding amines Compounds containing a primary amino group are converted into compounds containing a fluorine atom in place of the amino group by reaction of the amino compound with hydrogen fluoride and a nitrosating reagent under the influence of ultrasound or microwav... | 01/30/2001 |
| 6174415 | Chlorinating side chains of aromatic compounds Disclosed is a method of chlorinating the side chains of an aromatic compound having the general formula ##STR1## where each R is independently selected from R' or OR', each R' is independently selected from alkyl from C1 to C6, and ... | 01/16/2001 |
| 6117278 | Method of making -chloroxylenes Disclosed is a method for making high purity -chloroxylenes. A composition is formed of about 15 to about 80 wt % of a xylene and about 20 to about 85 wt % of a solvent. The solvent can be toluene, ring halogenated toluene, benzotrichloride, ring h... | 09/12/2000 |
| 5821393 | Process for the preparation of aromatic bromoalkyl-substituted hydrocarbon compounds The present invention relates to a process for the preparation of an aromatic bromoalkyl-substituted hydrocarbon compound, in which an alkyl-substituted aromatic hydrocarbon compound is reacted with a brominating agent in the presence of water.... | 10/13/1998 |
| 5514254 | Procedure for the photochlorination of alkyl-aromatic compounds An alkyl-aromatic compound is selectively photochlorinated in the side chain in a cyclic reaction system wherein said compound is continuously circulated between a container and photochlorination reactor. The compound is partially chlorinated after each passag... | 05/07/1996 |
| 5484932 | Halogenation processes in advantageous solvents, and novel bistrifluoromethyl-polyfluoroalkoxybenzenes Compounds such as ##STR1## wherein R is F, CF3, CF2 H, CHF CF3 or CF2 CF3, as well as related compounds containing chlorine, are used as solvents in halogenation processes.... | 01/16/1996 |
| 5279719 | Method for chlorination of methylated aromatic compounds A process for chlorination of methylated aromatic compounds in a titanium tetrachloride is disclosed. The ring chlorination is first carried out by reacting said methylated aromatic compounds with chlorine gas under reduced light conditions, and then the ... | 01/18/1994 |
| 5092971 | Bromination Selective bromination of alkylarenes to the alpha monobrominated derivative is desirable as a precursor for the selective production of, for example, the corresponding alcohols. The product can be obtained by a photolytic reaction between the substrate, h... | 03/03/1992 |
| 5064518 | Method for the selective alpha halogenation of alkylaromatic compounds Inorganic and organic hypohalites are used to obtain good selectivity to alpha halogenation of alkyl aromatic compounds. Alkali and alkaline earth hypohalites must be used in conjunction with a phase transfer medium. Useful organic hypohalites are the ter... | 11/12/1991 |
| 4992151 | Method for the selective alpha halogenation of alkylaromatic compounds Inorganic and organic hypohalites are used to obtain good selectivity to alpha halogenation of alkyl aromatic compounds. Alkali and alkaline earth hypohalites must be used in conjunction with a phase transfer medium. Useful organic hypohalites are the ter... | 02/12/1991 |
| 4943358 | Oxidation process It is desired to find an alternative way to produce benzophenones or substituted benzophenones which does so selectively and avoids the problems of previous methods that use, for example, large amounts of an aluminium chloride catalyst or nitric acid. In ... | 07/24/1990 |
| 4923580 | Bromination Selective bromination of alkylarenes to the alpha dibrominated derivative is desirable as a precursor for the selective production of, for example, the corresponding aromatic aldehyde. Improvements in the extent of selectivity of the product and/or its rate of... | 05/08/1990 |
| 4898998 | Process for producing brominated acenaphthylene condensates A process for producing brominated acenaphthylene condensates of the formula: ##STR1## wherein x is 1 or 2, y is an integer from 1 to 6 and n is 1 or more, from elementary units of the following formulas: ##STR2## wherein y is as defined ab... | 02/06/1990 |
| 4664765 | Photochemical synthesis of allenic and propargylic organomercuric halides Propargylic halides, preferably the bromide and iodide, react with metallic mercury in a finely divided state, in the presence of sunlight to form the corresponding allenic or propargylic organomercuric halides in high yield.... | 05/12/1987 |
| 4643811 | Photochemical process for the preparation of dichlorotrifluoroethoxy- and dichlorotrifluoroethlythiobenzene derivatives A process for the preparation of 1,1-dichloro-2,2,2-trifluoroethoxybenzene derivatives or 1,1-dichloro-2,2,2-trifluoroethylthiobenzene derivatives. A 2,2,2-trifluoroethoxybenzene or a 2,2,2-trifluoroethylthiobenzene derivative is brought into contact with... | 02/17/1987 |
| 4484993 | Process for producing fluorine-containing organic compound A process for producing fluorine-containing organic compounds characterized in that fluorine-containing aliphatic iodides which comprise at least one selected from the group of Rf I, Rf ZnI and Rf SnX2 I (where ... | 11/27/1984 |
| 4466870 | Organic sonochemistry process The method of causing or promoting chemical changes involving the step of subjecting reactants to ultrasonic energy as a key treatment step, including methods of: (1) reducing aryl halides by treating a mixture of aryl halide and lithium aluminum hydride ... | 08/21/1984 |
| 4348265 | Process for the selective aliphatic chlorination of alkylbenzenes Alpha-chlorinated cumene derivatives are prepared by chlorinating cumene derivatives in the presence of light. The chlorination may be taken to 100 percent conversion when performed in a solvent, e.g., m-dichlorobenzene.... | 09/07/1982 |
| 4331821 | Process for the monohalogenation of alkylbenzenes in the -position and new alkylbenzenes monohalogenated in the -position A process for the monohalogenation of alkylbenzenes in the -position is disclosed wherein an alkylbenzene reactant containing a hydrogen atom in the -position is contacted with a halogen and the reaction mixture is withdrawn such that the am... | 05/25/1982 |
| 4306102 | P-Tert.butylbenzotribromide and p-tert.butylbenzoyl bromide and process for their manufacture p-Tert.butylbenzotribromide and the derivatives thereof which is halogen-substituted at the nucleus are prepared under side chain halogenation conditions by bromination of p-tert.butyltoluene and its derivatives substituted at the nucleus by halogen. Prac... | 12/15/1981 |
| 4278516 | Method for the preparation of 2-fluoro-4-monobromomethylbiphenyl 2-(2-Fluoro-4-biphenylyl)propionic acid is prepared from 2-amino-4-methyl-biphenyl via a series of novel intermediates. In particular 2-amino-4-methylbiphenyl is converted to 2-fluoro-4-methylbiphenyl, the methyl group is brominated to form 2-fluoro-... | 07/14/1981 |
| 4268457 | Process for the preparation of paraphenoxybenzoylchloride The compound p-phenoxybenzotrichloride, useful as an intermediate in the preparation of various pesticides and monomers for the production of polyketone polymers, is prepared by the light-catalyzed reaction of p-phenoxytoluene with chlorine.... | 05/19/1981 |
| 4256907 | Preparation of substituted vinylcyclopropane-carboxylic acid esters A process for the preparation of a substituted vinyl-cyclopropanecarboxylic acid ester of the formula ##STR1## in which R1 and R2 each independently is alkyl with 1-4 carbon atoms or halogen, R3 is halogen, phenoxy or... | 03/17/1981 |
| 4235807 | Synthesis of 2,6-disubstituted benzonitriles A one step method of converting 2,6-disubstituted benzaldehydes to 2,6-disubstituted benzonitriles which comprises heating benzaldehyde in the presence of a hydroxylamine and a dehydrating agent for about 1 to 40 hours at a temperature of 110°-250° and ... | 11/25/1980 |
| 4213920 | Process for the production of substituted benzaldehydes A process for the production of benzaldehydes which are substituted in the ortho-position by an electrophilic group R, which comprises brominating an ortho-substituted compound of the formula I ##STR1## in which R represents the nitro group, the cyan... | 07/22/1980 |
| 4191621 | Process for the production of substituted benzal and benzyl bromides The invention describes a process for the production of benzal or benzyl bromides which contain electrophilic substituents in the ortho- and/or para-position, or mixtures thereof, by the side-chain bromination of correspondingly substituted toluene, which... | 03/04/1980 |
| 4165268 | Process for the production of substituted toluene compounds A process for the production of benzal bromides which contain an electrophilic substituent in the ortho- and/or para-position of the formula (Ia), or of mixtures thereof with the corresponding benzyl bromides of the formula (Ib), ##STR1## IN WHI... | 08/21/1979 |
| 4165337 | Process for producing phthaloyl dichlorides of high purity A batchwise or continuous process for producing isophthaloyl dichloride or terephthaloyl dichloride having a high purity which comprises, in combination, (1) a first step of producing ,,,',','-hexachloroxylene by ... | 08/21/1979 |
| 4144152 | Dehalogenation of halogenated compounds Process for degrading halogenated organic compound having C-halogen groups to remove halogen atoms from said compound by treating it with ultraviolet (UV) radiation and hydrogen. Process for degrading such compound by treating it in aqueous alkaline solut... | 03/13/1979 |
| 4133837 | Preferential aliphatic halogenation of ar-substituted alkylbenzenes In an isomeric mixture of ar-substituted-1-(sec-alkyl)benzenes, such as a mixture of 2-chlorocumene, 3-chlorocumene and 4-chlorocumene, the alkyl groups of the 3-isomer and 4-isomer react preferentially with a halogen in the presence of a catalyst such as... | 01/09/1979 |
| 4056454 | Process for the preparation of ,,','-pentachloro-o-xylene Process for the preparation of , ,,','-pentachloro-o-xylene by the reaction of o-xylene with chlorine in the presence of solvent and under actinic light radiation, characterized in that the reaction is performed at tempe... | 11/01/1977 |
| 4056455 | Process for the continuous preparation of mono- or di-(trichloromethyl)-benzenes Continuous preparation of mono- or di-(trichloromethyl)-benzenes or of mono- or di-(trichloromethyl)-benzenes substituted in the benzene ring by halogen atoms from the corresponding mono- or dimethylbenzenes and chlorine in several steps with radiation by... | 11/01/1977 |
| 4048033 | Process for preparing perchloromethylbenzene A process for producing perchloromethylbenzene by reacting a methylbenzene selected from the group consisting of compounds of the formula ##STR1## WHEREIN X is a chlorine or bromine atom, m is a number of 0, 1 or 2, and n is an integer of 1 to 3, And... | 09/13/1977 |
| 4046656 | Photochlorination process for methyl aromatic compounds The rate of photochlorination of methyl aromatic compounds, such as toluene, cresol, xylene, toluenesulfonyl chloride, methylnaphthalene, diphenylmethane, etc., is increased when carried out in the presence of bromine.... | 09/06/1977 |
| 4030994 | Substitutive fluorination of organic compounds Organic compounds having at least one replaceable hydrogen atom are fluorinated in the liquid or solid state by treatment with fluoroxyperfluoroalkanes or fluoroxypentafluorosulfur under the influence of a free radical initiator.... | 06/21/1977 |
| 4029560 | Process for producing ,,,',','-hexachloroxylene This invention concerns to a process for ,,,',','-hexachloroxylene by reacting m-xylene or p-xylene or a partially chlorinated product thereof with chlorine under the irradiation of ultraviolet rays, the process ... | 06/14/1977 |
