Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7425650 | Synthesis of asymmetric tetracarboxylic acids and corresponding dianhydrides This invention relates to processes for preparing asymmetrical biphenyl tetracarboxylic acids and the corresponding asymmetrical dianhydrides, namely 2,3,3′,4′-biphenyl dianhydride (a-BPDA), 2,3,3′,4′-benzophenone dianhydride (a-BTDA) and 3,4′-methylenedip... | 09/16/2008 |
| 7319161 | Method for producing cyclohexane dicarboxylic acids and the derivatives thereof The invention relates to a process for preparing cyclohexanedicarboxylic acids or derivatives thereof, such as esters and/or anhydrides, encompassing the reaction of diene/maleic acid anhydride mixtures, in particular of butadiene/maleic acid anhydride mixtures or o... | 01/15/2008 |
| 7314945 | Creatine-fatty acids The present invention describes compounds produced from a creatine molecule and a fatty acid molecule. The compounds being in the form of creatine-fatty acid compounds being bound by an anhydride linkage, or mixtures thereof made by reacting creatine or derivatives ... | 01/01/2008 |
| 7271297 | Process for producing vinyl ether compounds A process produces vinyl ether compounds and includes allowing a vinyl ester compound represented by following Formula (1): wherein R1, R2, R3 and R4 are the same or di... | 09/18/2007 |
| 6987201 | Acetic anhydride, method of purifying crude acetic anhydride, and method of producing polyoxytetramethylene glycol using acetic anhydride The present invention provides acetic anhydride, a method of purifying crude acetic anhydride, and a method of producing polyoxytetramethylene glycol using acetic anhydride. A method of producing polyoxytetramethylene glycol by ring-opening-polymerizing tetra... | 01/17/2006 |
| 6960682 | Process for production of acetyl anhydrides and optionally acetic acid from methane and carbon dioxide Acetyl anhydrides such as acetyl sulfate are produced by a process for comprising contacting methane and carbon dioxide in an anhydrous environment in the presence of effective amounts of a transition metal catalyst and a reaction promoter, and an acid anhydride com... | 11/01/2005 |
| 6762327 | Selective oxidation process with enhanced safety A safe and effective process for the oxidation of a primary or secondary alcohol to the corresponding aldehyde or ketone via the reaction of said alcohol with an anhydride solution of a 1,1,1-tri(C2-C4 alkanoyloxy-1,1-dihydro-1,2-benziodoxol-3(... | 07/13/2004 |
| 6753431 | Production of mixed acid anhydride and amide compound There is disclosed an advantageous mixed acid anhydride production method of formula (1): R1C(O)OY(O)n(R2)p (1) wherein R1, R2 and Y denote the same as defined bel... | 06/22/2004 |
| 6730810 | Anhydride stabilization Disclosed herein are compositions comprising organic anhydrides having a reduced tendency to discolor with time, even when held at elevated temperatures for extended times. The compositions are produced by mixing at least one acid halide and various derivatives of h... | 05/04/2004 |
| 6706249 | Composite polybasic salt, process for producing the same, and use A composite metal polybasic salt containing a trivalent metal and magnesium as metal components and having a novel crystal structure, and a method of preparing the same. The invention further deals with a composite metal polybasic salt which has anion-exchanging pro... | 03/16/2004 |
| 6646062 | Production of improved polymers via the use of star cores There is provided a process for producing high molecular weight polymer comprising the step of reacting one or more preformed linear polymers with one or more cores (as hereinbefore defined) to form high molecular weight polymers, wherein the preformed li... | 11/11/2003 |
| 6603042 | Anhydride stabilization Disclosed herein are compositions comprising organic anhydrides having a reduced tendency to discolor with time, even when held at elevated temperatures for extended times. The compositions are produced by mixing at least one acid halide and various deriv... | 08/05/2003 |
| 6593495 | Anhydride stabilization Disclosed herein are compositions comprising organic anhydrides having a reduced tendency to discolor with time, even when held at elevated temperatures for extended times. The compositions are produced by mixing at least one acid halide and various deriv... | 07/15/2003 |
| 6503995 | Method of producing crosslinkable silyl group-containing polyoxyalkylene polymers A method of producing a polyoxyalkylene polymer having at least one crosslinkable silyl group and at least one hydroxyl group in each molecule which comprises treating a polyoxyalkylene polymer having at least one unsaturated group and at least one alcoho... | 01/07/2003 |
| 6469206 | Process for the preparation of triflic anhydride Disclosed is a process for the preparation of trifluoromethanesulfonic acid anhydride by the steps of (1) forming a mixed anhydride comprising a trifluoromethanesulfonyl acyl residue and a carboxyl residue by contacting trifluoromethanesulfonic acid or a ... | 10/22/2002 |
| 6448431 | Production of aryl carboxylate esters Disclosed is a process for the preparation of aryl carboxylate esters by the reaction of a phenol reactant with an esterification agent selected from carboxylic acid anhydrides and carboxylic acid halides in the presence of trifluoroacetic acid (TFA).... | 09/10/2002 |
| 6379751 | Imparting water-repellency with polysiloxanes containing carboxyl groups The invention relates to polysiloxanes containing carboxyl groups that are useful for imparting water-repellency to substrates, a process for their preparation, a water-repellent system containing such polysiloxanes, and a process for the production of hy... | 04/30/2002 |
| 6207733 | Capped amines as hardeners for monocomponent (1c) epoxy resin systems which can be diluted with water Capped amine hardeners for epoxy resins, which are reaction products of amines A having at least two primary amino groups, cyclic alkylene carbonates B, aliphatic carbonyl compounds C and compounds D having at least two groups which react with hydroxyl gr... | 03/27/2001 |
| 6194612 | Template for solution phase synthesis of combination libraries This invention features a template for synthesizing combinatorial libraries, methods of synthesizing combiatorial libraries of chemical compounds utilizing the template, and combinatorial libraries of chemical compounds formed by the methods of this inven... | 02/27/2001 |
| 5750678 | Water-soluble dextran fatty acid esters and their use as solubilizers The invention relates to a water-soluble, haemolytically inactive dextran fatty carboxylate with amphiphilic properties made from a dextran with an average molecular weight of 5,000 to 100,000 and a C10 to C14 fatty acid, preferably ... | 05/12/1998 |
| 5652336 | Polymer-bound mixed carboxylic anhydrides as a stable form of activated carboxylic acids Polymer-bound mixed carboxylic anhydrides can be prepared under mild conditions by the condensation of carboxylic acids (including N-protected amino acids) with polymer-bound acid chlorides. These mixed anhydrides function as polymeric reagents in the sen... | 07/29/1997 |
| 5643552 | Nanoparticulate diagnostic mixed carbonic anhydrides as x-ray contrast agents for blood pool and lymphatic system imaging This invention relates to methods of x-ray diagnostic imaging the blood pool, liver, spleen, and/or lymph system of a mammal comprising administering a contrast effective amount of a mixed carbonic anhydride as a contrast agent having the structure #... | 07/01/1997 |
| 5606068 | Acid anhydrides, their preparation and their use This invention relates to novel anhydrides of general formula (I), ##STR1## wherein Ar is an aryl radical, and either R1 is C6 H5 --CO or (CH3)3 C--O--CO, R2 is a hydrogen atom and R3 | 02/25/1997 |
| 5573749 | Nanoparticulate diagnostic mixed carboxylic anhydrides as X-ray contrast agents for blood pool and lymphatic system imaging This invention relates to methods of x-ray diagnostic imaging the blood pool, liver, spleen, and/or lymph system of a mammal comprising administering a contrast effective amount of a mixed carbonic anhydride as a contrast agent having the structure #... | 11/12/1996 |
| 5516892 | Polymer-bound mixed carboxylic anhdrides as a stable form of activated carboxylic acids Polymer-bound mixed carboxylic anhydrides can be prepared under mild conditions by the condensation of carboxylic acids (including N-protected amino acids) with polymer-bound acid chlorides. These mixed anhydrides function as polymeric reagents in the sen... | 05/14/1996 |
| 5516911 | Fluorescent intracellular calcium indicators A new class of calcium-specific, NMR-active and/or fluorescent indicators having a high dissociation constant is described. Methods of determining intracellular calcium ion concentration using 19 F NMR spectroscopy or optical methods are also p... | 05/14/1996 |
| 5498729 | Prodrug compositions Compositions degrading by hydrolysis to release a bioactive compound having carboxylic acid moieties, which are organic acid anhydrides having the following formula: ##STR1## wherein R' is a residue of a therapeutic bioactive compound, for example, ... | 03/12/1996 |
| 5472683 | Nanoparticulate diagnostic mixed carbamic anhydrides as X-ray contrast agents for blood pool and lymphatic system imaging This invention relates to methods of x-ray diagnostic imaging the blood pool, liver, spleen, and/or lymph system of a mammal comprising administering a contrast effective amount of a mixed carbamic anhydride as a contrast agent having the structure #... | 12/05/1995 |
| 5430181 | Process for improving a controlled oxidation reaction Process for improving a controlled oxidation reaction between at least one reactant and oxygen, in which at least one reactant is reacted with oxygen or an oxygen containing gas, constituting a reaction mixture, in the presence of at least one additional ... | 07/04/1995 |
| 5391819 | Process of making chiral 2-aryl-1,4-butanediamine derivatives as useful neurokinin-A antagonists Disclosed herein is a process of making chiral 2-aryl-1,4-butanediamine derivatives useful as neurokinin-A antagonists of Formula 7 ##STR1##... | 02/21/1995 |
| 5391796 | Production of trifluorovinyl ethers A two step process, each of the steps being novel, for the production of trifluorovinyl ethers by reaction of a siloxane with selected acyl fluorides or carboxylic anhydrides, is disclosed. Also disclosed is a novel silyl ester intermediate.... | 02/21/1995 |
| 5385687 | Polyanhydride modified adducts or reactants and oleaginous compositions containing same An oil soluble dispersant additive useful in oleaginous compositions selected from fuels and lubricating oils comprising the reaction products of: (i) at least one intermediate adduct comprised of the reaction products of (a) at least one polyanhydride, and (b... | 01/31/1995 |
| 5155234 | Nitration of phthalic acid and phthalic anhydride using nitric acid A process for the preparation of nitrophthalic acid by the nitration of phthalic acid and/or phthalic anhydride using only nitric acid, said nitric acid having a concentration of at least about 95% by weight, and then recovering the nitrophthalic acid for... | 10/13/1992 |
| 5144067 | Process for the coproduction of alkyl iodides and alpha-iodocarboxylic acids and/or anhydrides thereof Disclosed is a process for the coproduction of (1) an alkyl iodide and (2) an -iodocarboxylic acid, a mono--iodocarboxylic anhydride or a mixture thereof which comprises contacting a mixture of an iodine compound and a carboxylic anhydride w... | 09/01/1992 |
| 5144070 | Process for the preparation of -iodocarbonyl compounds Disclosed is a process for the preparation of -iodocarbonyl compounds such as -iodocarboxylic acid anhydrides and -iodoketones by the reaction of a carboxylic anhydride with molecular iodine. Hydrolysis of the -iodocarboxylic a... | 09/01/1992 |
| 5117035 | Fluorine-containing acrylic acid derivative and polymer thereof A novel fluorine-containing acrylic acid derivative of the invention is represented by the formula: (CH2 .dbd.CF--CO)p --A (I) wherein A is a residue derived from an organic compound having at least two active hy... | 05/26/1992 |
| 5106541 | Manganese compound catalyzed oligomerization reactions and products thereof Oligomers and addition products obtained from the reaction of a saturated or olefinically unsaturated carboxylic acid, alcohol, ether, or ester with a substituted or unsubstituted acetic anhydride in the presence of a Mn compound, and processes for their ... | 04/21/1992 |
| 4863965 | Ibuprofen acid anhydrides and prodrug pharmaceutical composition containing the same Pharmaceutical compositions of the prodrug type, a process for the preparation thereof, a process for the preparation of the as prodrug functioning compounds and compounds obtained herein. The pharmaceutical compositions of the invention contain organic acid ... | 09/05/1989 |
| 4852989 | Bleaching compounds and compositions comprising fatty peroxyacids salts thereof and precursors therefor having amide moieties in the fatty chain This invention relates to bleaching compounds and compositions that provide effective and efficient surface bleaching of textiles over a wide range of bleach solution temperatures. The bleaching compounds of the invention yield a peroxyacid with a polar a... | 08/01/1989 |
| 4812264 | Method for racemization of optically active chrysanthemic acid derivatives Racemization of an optically active chrysanthemic acid derivatives of the formula: ##STR1## wherein X represents a chlorine atom, bromine atom or 2,2-dimethyl-3-isobutenyl-cyclopropane carboxyl group and * mark represents asymmetric carbon atom,... | 03/14/1989 |
