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 |
| 7915430 | Catalytic method for producing phenolphthalein compounds A method of producing a phenolphthalein comprises reacting a phenolic compound of the formula: wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of t... | 03/29/2011 |
| 7868190 | Method for producing phenolphthalein using a heteropolyacid catalyst A method for producing a phenolphthalein compound comprises: reacting a phenolic compound of the formula: wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride co... | 01/11/2011 |
| 7838689 | Method for producing phenolphthalein compound using ionic liquid catalyst composition A method for producing a phenolphthalein compound is disclosed, comprising: reacting a phenolic compound of the formula: wherein Ra is a hydrogen or a C1-C12 hydrocarbyl group, with a phthal... | 11/23/2010 |
| 7408016 | Methods for producing and purifying 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine monomers and polycarbonates derived therefrom A composition comprising a polycarbonate, wherein the polycarbonate has a weight average molecular weight of greater than 15,000, comprises more than 15 mole percent structural units derived from a 2-aryl-3,3-bis(4-hydroxyaryl)phthalimide: | 08/05/2008 |
| 7214823 | Hydroxycitric acid complex metal salts, composition, and methods Described are tri-, tetra-, and penta-metal complex salts of hydroxycitric acid, compositions containing the same, and methods of making the same, where the salt comprises at least three different metals selected from zinc, magnesium, sodium, potassium, and calcium.... | 05/08/2007 |
| 7135577 | Methods for producing and purifying 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine monomers and polycarbonates derived therefrom Disclosed herein is a method for producing a 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine. The method comprises forming a reaction mixture comprising at least one substituted or unsubstituted phenolphthalein compound, at least one substituted or unsubstituted p... | 11/14/2006 |
| 6872839 | Benzofuran-2-one Benzofuran-2-ones, compositions comprising benzofuranones, processes for preparing them, and their use as colorants for high or low molecular mass organic material. ... | 03/29/2005 |
| 6479704 | Hydrogenation with monolith reactor under conditions of immiscible liquid phases The present invention relates to an improved for the hydrogenation of an immiscible mixture of an organic reactant in water. The immiscible mixture can result from the generation of water by the hydrogenation reaction itself or, by the addition of, water ... | 11/12/2002 |
| 5997891 | Materials and methods utilizing a temporary visual indicator This invention relates to novel compositions containing temporary visual indicators and methods for using these compositions. Specifically, this invention relates to a sunscreen composition containing an indicator that is visible when the substance is app... | 12/07/1999 |
| 5886196 | Method of catalyzing condensation reactions Hydrogen bis(oxalato)borate of the formula ##STR1## is used as a protonic acid catalyst in condensation reactions, such as Friedel-Crafts condensations, vinyl ether condensations of acetals with vinyl or propenyl ethers and acylations of phenols. The... | 03/23/1999 |
| 5837645 | Materials and methods utilizing a temporary visual indicator This invention relates to novel compositions containing temporary visual indicators and methods for using these compositions. Specifically, this invention relates to a sunscreen composition containing an indicator that is visible when the substance is app... | 11/17/1998 |
| 5532029 | Materials and methods utilizing a temporary visual indicator This invention relates to novel compositions containing temporary visual indicators and methods for using these compositions. Specifically, this invention relates to a sunscreen composition containing an indicator that is visible when the substance is app... | 07/02/1996 |
| 5231195 | Ethylenically unsaturated phenolphthaleinic monomers Phenolphthaleinic bis(acrylate), phenolphthaleinic bis(methacrylate), and phenolphthaleinic (acrylate) (methacrylate) may be polymerized to form polymerizates especially useful for lenses and lens blanks.... | 07/27/1993 |
| 5210232 | Pyran-containing phthalides Pyran-containing phthalides of the formula ##STR1## in which R is hydrogen, alkyl which has not more than 12 carbon atoms and is unsubstituted or substituted by halogen, cyano, hydroxyl or lower alkoxy, or is cycloalkyl, phenalkyl or phenyl each of w... | 05/11/1993 |
| 5011967 | Method for preparing aromatic bischloroformate compositions Bischloroformate oligomer compositions are prepared by passing phosgene into a heterogeneous aqueous-organic mixture containing at least one dihydroxyaromatic compound, with simultaneous introduction of a base at a rate to maintain a specific pH range and... | 04/30/1991 |
| 4904810 | Bischoloroformate preparation method with phosgene removal and monochloroformate conversion Aqueous bischloroformates are prepared by the reaction of a dihydroxyaromatic compound (e.g., bisphenol A) with phosgene in a substantially inert organic liquid (e.g., methylene chloride) and in the presence of an aqueous alkali metal or alkaline earth me... | 02/27/1990 |
| 4855460 | Process for perfluoroalkylation of acid anhydrides A process for the preparation of perfluoroalkylated ketones and/or perfluoroalkylated alcohols, comprising the step of contacting a perfluoroalkyl iodide or perfluoroalkyl bromide with an acid anhydride, in the presence of a metal chosen from zinc and cad... | 08/08/1989 |
| 4732991 | Substituted phthalides Process comprises the combination of the three steps of condensing 3-N(R)2 -4-X-benzoic acid with an aromatic or heterocyclic aldehyde, Y-CHO, under acidic conditions to produce 3-Y-5-X-6-N(R)2 phthalide (II), condensing said phthali... | 03/22/1988 |
| 4695648 | Novel arylacetic acid derivatives A compound having a potentially inhibitory effect on 15-hydroxy-prostaglandin dehydrognase (PGDH) and having the formula ##STR1## in which R1 and R2 are hydrogen or lower alkyl; R3 is hydrogen, lower alkyl or substituted o... | 09/22/1987 |
| 4588744 | Method of forming an aqueous solution of 3-3-Bis(p-hydroxyphenyl)-phthalide There is disclosed a method and composition of matter for treating mammalian inflammatory viral infections, acne, dermatitis, and arthritic conditions comprising the application of 3,3-Bis(p-hydroxyphenyl)-phthalide (phenolphthalein) by itself, or in ... | 05/13/1986 |
| 4535090 | 3,5-Diphenyl-1H-1,2,4-triazoles pharmaceutical compositions and uses 3,5-diphenyl-1H-1,2,4-triazoles with contragestational activity of the following formula ##STR1## wherein R may be located on one or the other of the two adjacent nitrogen atoms and may represent hydrogen or a group R5 CO-- wherein R5... | 08/13/1985 |
| 4520208 | Aromatic polyester containing phenolphthalein unit and bis-phenol unit An aromatic polyester comprising two structural units represented by the following formulas A and B in a molar ratio of the structural unit A to the structural unit B being from 70:30 to 90:10 or four structural units represented by the following formulas... | 05/28/1985 |
| 4439610 | Process for preparing triarylmethane derivatives A process is described for preparing triarylmethane derivatives of a high purity in an extremely high yield from 3-phenylphthalide derivatives and aniline derivatives or indole derivatives with Friedel-Crafts type catalyst or Friedel-Crafts type catalyst ... | 03/27/1984 |
| 4399291 | Process for the production of substituted aminophthalides Process comprises the combination of the two steps of condensing Y-benzaldehyde with N--R2 --N--R3 -aniline and 3--N--R--N--R1 -benzoic acid, under acidic conditions to produce 2-[(Y-phenyl) (4--N--R2 --N--R | 08/16/1983 |
| 4256844 | Fire retardant, thermosetting, resinous reaction products of phosphoric acid and methyol- or alkoxymethyl-substituted epoxides Phosphoric acid is reacted with mono- or polyfunctional epoxides containing methyol or alkoxymethyl groups, to provide resins which are curable simply by heating and contain as much as about 30 weight percent of phosphoric acid. Improved flame retardancy ... | 03/17/1981 |
| 4256727 | Synthesis and use of diagnostic radio-pharmaceuticals comprising radioactive isotopes of bromine with dyes A process for preparing bromine-containing dyes labelled with gamma-emitting isotopes of bromine, and the product thereof which is useful as an imaging agent for the hepato-biliary system, particularly in dynamic imaging methods. The dyes prepared are fro... | 03/17/1981 |
| 4252725 | Preparation of phenolphthalein using cation exchange resins and aryl phosphites A process for the preparation of phenol-phthalein wherein phenol and phthalic anhydride are reacted in the presence of a crosslinked sulfonic cation exchange resin in the acid form and wherein the water content of the reaction mixture is reduced by the us... | 02/24/1981 |
| 4225704 | Preparation of halogenovinyl-substituted tetra-hydrofuran-2-ones Halogenovinyl-substituted tetrahydrofuran-2-ones of the formula ##STR1## are prepared by reacting a peracid such as peracetic, perpropionic or m-chloroperbenzoic acid with a halogenvinyl-substituted cyclobutanone of the formula ##STR2## in ... | 09/30/1980 |
| 4045458 | Process for preparing triarylmethane derivatives A process is described for preparing triarylmethane derivatives of a high purity in an extremely high yield from 3-phenylphthalide derivatives and aniline derivatives or indole derivatives with Friedel-Crafts type catalyst or Friedel-Crafts type catalyst ... | 08/30/1977 |
| 4035391 | Phthalide and naphthalide derivatives This invention relates to a process of preparing phthalein indicator dyes including phthalides and naphthalides derived from certain hydroxy-substituted carbocyclic aryl compounds, such as phenols, and from certain N-heterocyclic aryl compounds, such as i... | 07/12/1977 |
| 4032545 | Phthalides and naphthalides This invention relates to a process of preparing phthalein indicator dyes including phthalides and naphthalides derived from certain hydroxy-substituted carbocyclic aryl compounds, such as phenols, and from certain N-heterocyclic aryl compounds, such as i... | 06/28/1977 |
| 4010168 | Naphthalide indicator dyes This invention relates to 1-naphthol (na)phthalide indicator dyes substituted with a particular class of hydrogen bonding groups, such as, perhaloalkyl carbinols. These dyes are useful as optical filter agents in photographic processes to protect a select... | 03/01/1977 |
| 4005134 | Method for making aromatic bis(ether dicarboxylic acid) A method is provided for making aromatic bis(ether dicarboxylic acid) useful for making high performance injection moldable polyetherimides. An aromatic bis(ether N-organo phthalimide) is hydrolyzed directly to the corresponding tetra-acid by heating the ... | 01/25/1977 |
| 3976662 | 1:1 Adducts of 1-naphthol and (Na)phthalaldehydic acid This invention relates to derivatives of phthalaldehydic and naphthalaldehydic acid useful as intermediates in the preparation of pH-sensitive phthalide and naphthalide indicator dyes. One class of intermediates provided by the present invention comprises... | 08/24/1976 |
| 3975405 | Monophosphate salt of o-cresolphthalein O-cresolphthalein monophosphoric acid and salts thereof useful as substrates for alkaline phosphatase determinations are produced by reacting cresolphthalein with dibenzyl phosphite in the presence of carbon tetrachloride and an organic amine, hydrogenati... | 08/17/1976 |
| 3954799 | Protonated indole phthalides and naphthalides This invention relates to protonated compounds of the formula: ##SPC1## Wherein A is a radical selected from ##SPC2## X represents the atoms necessary to complete a ring-closing moiety selected from phthalide and naphthalide; and Z is an anion derived fro... | 05/04/1976 |
| 3944570 | 3,3-Disubstituted phthalides Phthalanols disubstituted in the 3-position, e.g. 3-(4-chlorophenyl)-3-(2-dimethylaminomethyl phenyl)-1-methyl-1-phthalanol, prepared by alkylating corresponding phthalides, are useful as anti-inflammatory agents.... | 03/16/1976 |
| 3944569 | Aminomethyl-substituted 1-naphthol phthalides and naphthalides This invention relates to a class of phthalein indicator dyes useful as optical filter agents in photographic processes to protect a selectively exposed photosensitive material from further exposure during processing in the presence of incident light. Suc... | 03/16/1976 |
| 3931228 | Process for preparing phthalide and naphthalide indicator dyes This invention relates to a process of preparing phthalein indicator dyes including phthalides and naphthalides derived from certain hydroxy-substituted carbocyclic aryl compounds, such as phenols, and from certain N-heterocyclic aryl compounds, such as i... | 01/06/1976 |
| 3931236 | Oxidation and dehydrohalogenation of halotetrahydropyrans A halotetrahydropyran is oxidized and dehydrohalogenated employing oxygen and a free radical initiator. 4-Chlorotetrahydropyran is converted to 5,6-dihydro-1,2-pyrone using 2,2'-azobis(2-methylpropionitrile) under elevated oxygen pressure and at a tempera... | 01/06/1976 |
