Class 549/245 - The -C(=X)- is part of a -C(=X)XH group, wherein the X's are the same or diverse chalcogens, or salt thereof (e.g., trimellitic anhydride, etc.)

Subclass of Class 549 - Organic compounds -- part of the class 532-570 series
Definition: Compounds in which the -- is part of a --XH group, wherein
No. of patents: 51
Last issue date: 08/04/2009

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Number	Title	Issue Date
7569708	Liquid cyclohexane-tricarboxylic acid anhydride Trans, trans-1,2,4-cyclohexanetricarboxylic acid-1,2-anhydride represented by the following formula 1: a cyclohexanetricarboxylic anhydride being liquid at ordinary temperatures which contains such a anhydride, and a produc...	08/04/2009
7022776	Conductive polyphenylene ether-polyamide composition, method of manufacture thereof, and article derived therefrom A conductive thermoplastic composition includes specific amounts of a polyphenylene ether copolymer, a polyamide, and an electrically conductive filler. The composition exhibits excellent high-temperature dimensional stability and impact strength, and it is particul...	04/04/2006
6959248	Real-time detection method and system for identifying individual aerosol particles A method and system of identifying individual aerosol particles in real time. Sample aerosol particles are compared against and identified with substantially matching known particle types by producing positive and negative test spectra of an individual aerosol parti...	10/25/2005
6410753	Process for producing trimellitic anhydride A process for producing trimellitic anhydride which comprises performing liquid phase oxidation of pseudocumene containing 5% by weight or above of dimethyl bezaldehyde as a raw material for oxidation with air in aliphatic monocarboxylic acid having 1 to ...	06/25/2002
6147076	Analogues of N-acetylardeemin, method of preparation and uses thereof The present invention provides a compound having the structure: ##STR1## wherein R1 R6 and R7 are independently hydrogen, OH, NH2, SH, halogen, C1 -C9 linear or branched chain alkyl, a...	11/14/2000
6031061	Bis (triaklyltrimellitic anhydride) derivative and polyesterimide for optical communications formed therefrom A bis(trisubstitutedtrimellitic anhydride) derivative and a polyesterimide for optical communications, the polyesterimide being formed therefrom. The polyesterimide has a high refractive index, so that when using such polyesterimide as a material for a co...	02/29/2000
6018057	Process for producing acid anhydrides A process for producing anhydrides by passing a solution of the acid, preferably an organic polyacid, which is to undergo anhydridation over an acidified clay and a process for producing the catalysts therefor....	01/25/2000
5932641	Dispersants derived from anhydrides, novel filled polymer compounds, and applications of same Filled thermoplastic and/or thermosetting polymer compositions comprising a partially esterified carboxyl-group containing anhydride dispersant....	08/03/1999
5895820	Process for the production of trimellitic acid and process for the production of trimellitic acid anhydride A process for the production of a trimellitic acid by oxidizing dialkyl aromatic aldehyde and/or its oxide derivative in a liquid phase, the oxidation being carried out in a lower aliphatic carboxylic acid solvent having a water content of 5 to 70% by wei...	04/20/1999
5731443	Liquid phthalic anhydride recovery process using a rectification tower A process for recovering phthalic anhydride as a liquid from a vapor phase oxidation product which comprises mixing the vapor phase oxidation product having a temperature in the range of about 130° C. or greater with a first stream comprising maleic anhy...	03/24/1998
5710241	Monoanhydride compounds, method of making same and reaction products thereof The present invention relates to monoanhydride monomer compounds, methods of making such compounds and reaction products of the monoanhydride-diacid compounds with other monomers. The inventive monomer compounds exhibit selective reactivity, that is, the ...	01/20/1998
5670660	Process for collecting airborne anhydrides An apparatus and process for the recovery of airborne anhydrides such as anhydride vapor or dust wherein these airborne anhydrides are contacted with hot glycol, such as diethylene glycol, in the liquid phase to first dissolve and then react with the airb...	09/23/1997
5412108	Method for preparing 1,2,4-cyclohexanetricarboxylic acid and anhydride A method for preparing cis, cis, cis-1,2,4-cyclohexanetricarboxylic acid comprising contacting trimellitic acid with molecular hydrogen at an elevated temperature and pressure in the presence of a solvent and a catalyst comprising a transition metal depos...	05/02/1995
5346919	Anti-bacterial substances and microorganisms which produce them The present invention relates to the compound A of the formula (A), the related compound B, carboxylic acid derived from acid anhydride group of these compounds and esters and salts thereof, microorganisms for producing the compounds, methods for producin...	09/13/1994
5260456	Process for producing itaconic anhydride A process for producing anhydrides by passing a solution of the acid, preferably an organic polyacid, which is to undergo anhydridation over an acidified clay and a process for producing the catalysts therefor....	11/09/1993
5250724	Process for the preparation of trimellitic acid A very selective process for the catalytic air oxidation of pseudocumene to trimellitic acid. Manganese, cobalt, cerium and titanium in the presence of bromine are used as the catalyst....	10/05/1993
5235070	Suppression of dust from solid aromatic anhydrides A method for reducing the formation of dust produced by solid aromatic anhydrides, and aromatic anhydride compositions that have a reduced tendency to emit aromatic anhydride dust, are disclosed. The method comprises treating the aromatic anhydride with l...	08/10/1993
5124461	Process for the production of trimellitic anhydride with improved color A process for the production of trimellitic anhydride with improved color is disclosed. The process comprises heat treating trimellitic anhydride in the presence of oxides of boron or hydrated oxides of boron followed by fractionation. Trimellitic anhydri...	06/23/1992
5112992	Production of polycarboxylic acids with hafnium-activated cobalt catalyst The addition of hafnium to oxidation catalysts provided by a heavy transition metal-bromine ion catalyst combination containing cobalt-manganese-bromine or manganese-bromine or cobalt-bromine and a soluble source of hafnium uniquely increases catalytic ac...	05/12/1992
5101050	Process for the production of aromatic anhydrides and aromatic esters with superior color properties A process for the production of aromatic esters or aromatic anhydrides with improved color properties is disclosed. This process comprises treating the aromatic ester or aromatic anhydride with an activated boric acid followed by fractionation....	03/31/1992
5095141	Process for pseudocumene oxidation to trimellitic acid with mother liquor recycle A process is disclosed for oxidation of pseudocumene to trimellitic acid wherein process residue and bottoms from stripping procedures to recover process solvent are recycled and incorporated in filtrate mother liquor and reinjected into the oxidation rea...	03/10/1992
5069818	Functionalized polyphenylene ethers and blends with polyamides Functionalized polyphenylene ether compositions are provided which are particularly useful for effecting compatibility for a blend of polyphenylene ether resin and a polyamide resin. The functionalized-polyphenylene ether is the reaction product of a ...	12/03/1991
5010207	Process for the production of trimellitic anhydride with superior color properties A process for the production of trimellitic anhydride with improved color properties disclosed. This process comprises treating trimellitic anhydride with an activated silicon compound followed by fractionation and at temperatures of about 200° to about ...	04/23/1991
4948921	Process for the production and recovery of trimellitic acid A process for the oxidation of pseudocumene to TMLA is disclosed which comprises catalytic oxidation of pseudocumene with air in the presence of acetic acid in an oxidation zone in the liquid phase wherein the weight ratio of acetic acid to pseudocumene i...	08/14/1990
4946970	Suppression of trimellitic anhydride dust There is provided a trimellitic anhydride composition having a reduced tendency to form trimellitic anhydride dust which composition comprises trimellitic anhydride treated with at least one organic compound wherein the organic compound is both liquid and...	08/07/1990
4931572	Aromatic carboxylic anhydride catalyst In accordance with the process of this invention, an improved titanium dioxide rutile-based catalyst for molecular oxidation of a hydrocarbon to form the corresponding carboxylic anhydrides is prepared by the steps of (a) forming a catalyst precursor by d...	06/05/1990
4864036	Process for preparing aromatic carboxylic anhydride In accordance with the process of this invention, an improved catalyst for molecular oxidation of a hydrocarbon to form the corresponding carboxylic anhydrides is prepared by the steps of (a) forming a catalyst precursor by depositing on titanium dioxide ...	09/05/1989
4855457	Carboxylic anhydride process In accordance with the process of this invention, an improved catalyst for molecular oxidation of a hydrocarbon to form the corresponding carboxylic anhydrides is prepared by the steps of (a) forming a catalyst precursor by depositing on titanium dioxide ...	08/08/1989
4824915	Functionalized polyphenylene ethers and blends with polyamides Functionalized polyphenylene ether compositions are provided which are particularly useful for effecting compatibility for a blend of polyphenylene ether resin and a polyamide resin. The functionalized-polyphenylene ether is the reaction product of a ...	04/25/1989
4797497	Trimellitic anhydride purification process A process for the purification of trimellitic anhydride is disclosed herein in which molten trimellitic anhydride is mixed with pseudocumene at a temperature of about 200° F. to about 450° F. and wherein the purified trimellitic anhydride is recovered b...	01/10/1989
4788296	Process for the production and recovery of trimellitic anhydride An integrated process for manufacture of trimellitic acid anhydride by the steps of catalytic oxidation of pseudocumene in the presence of acetic acid in an oxidation zone wherein liquid-phase conditions are mantained, cooling the oxidation reaction efflu...	11/29/1988
4785120	Process for preparing substituted phthalic anhydrides Yield and assay (purity) improvements in the reaction of bromine and the Diels-Alder addition product of maleic anhydride and a conjugated diene in the presence of a nitrogenous acid acceptor are realized in the instant process. The heating time after com...	11/15/1988
4748255	Thermally adaptive polymers and prepolymers and methods of making them Reaction of an aromatic dianhydride with a polycyclic aromatic primary diamine at a controlled reaction rate yields a diamic acid dianhydride oligomer. The oligomer may be a precursor for an imide foam which forms at low temperature, has outstanding physi...	05/31/1988
4650880	Purification of substituted phthalic anhydrides A process for purifying crude substituted phthalic anhydrides, e.g. 4-methylphthalic anhydride, derived from the dehydrogenation in the presence of bromine of a Diels-Alder addition product of a conjugated diene, e.g. isoprene, and maleic anhydride. In th...	03/17/1987
4587350	Process for the production of trimellitic anhydride A process for the oxidation of pseudocumene to trimellitic acid anhydride is disclosed which comprises catalytic oxidation of pseudocumene with air in the presence of acetic acid in an oxidation zone in the liquid phase wherein the weight ratio of acetic ...	05/06/1986
4582911	Molecular oxidation of aromatic hydrocarbons to the corresponding anhydrides using an improved catalyst In accordance with the process of this invention, an improved catalyst for molecular oxidation of an aromatic hydrocarbon to form the corresponding aromatic carboxylic anhydrides is prepared by the steps of forming a catalyst precursor by depositing on ti...	04/15/1986
4582912	Process for preparing carboxylic anhydride using improved catalysts In accordance with the process of this invention, an improved catalyst for molecular oxidation of a hydrocarbon to form the corresponding carboxylic anhydrides is prepared by the steps of (a) forming a catalyst precursor by depositing on titanium dioxide ...	04/15/1986
4559405	Process for preparing substituted phthalic anhydrides A process for preparing substituted phthalic anhydrides, e.g. 4-methylphthalic anhydride, in which the Diels-Alder addition product of a conjugated diene, e.g. isoprene, and maleic anhydride is reacted with bromine in the presence of an acid acceptor. Typ...	12/17/1985
4537978	Process for the production of trimellitic anhydride A process for the oxidation of pseudocumene to trimellitic acid anhydride which comprises catalytic oxidation of pseudocumene with air in the presence of acetic acid in an oxidation zone in the liquid phase and wherein the weight ratio of acetic acid to p...	08/27/1985
4517371	Process for the synthesis of carboxylic anhydrides using a vanadium, phosphorus oxygen containing catalyst composition A vanadium, phosphorus oxygen containing catalyst composition capable of partially oxidizing hydrocarbons (e.g., n-butane) to form a carboxylic anhydride (e.g., maleic anhydride), a process for preparing this catalyst, and a process for using this catalys...	05/14/1985

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Class 549/245 - The -C(=X)- is part of a -C(=X)XH group, wherein the X's are the same or diverse chalcogens, or salt thereof (e.g., trimellitic anhydride, etc.)