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| Number | Title | Issue Date |
| 7090509 | Multi-port pluggable transceiver (MPPT) with multiple LC duplex optical receptacles An interface converter module includes a metallized housing having a first end and a second end. A printed circuit board is mounted within the housing and has mounted thereon electronic circuitry configured to convert data signals from a host device transmission med... | 08/15/2006 |
| 6984739 | Process for preparing R-(−)-carnitin from S-(−)-chlorosuccinic acid or from a derivative thereof An inner salt of L-carnitine is prepared by reduction, with a suitable reducing agent, of a compound of formula (I): where X1 and X2, which may be the same or different, are hydroxy, C1â... | 01/10/2006 |
| 6936722 | Polyhalogenated ethers (Per)haloethers having formula: X—(Rf)L—O—CF2CF2—O—CX1X2—CFX3X4  (I), process for obtaining them and hypofluorites usable in the synthesis of said (per)h... | 08/30/2005 |
| 6677476 | Process for preparing R-(-) -carnitine from S-(-)-chlorosuccinic acid or from a derivative thereof An inner salt of L-carnitine is prepared by reduction, with a suitable reducing agent, of a compound of formula (I): ##STR1## where X1 and X2, which may be the same or different, are hydroxy, C1 -C4 alkoxy, phen... | 01/13/2004 |
| 6579658 | Polymers, resist compositions and patterning process Polymers comprising recurring units of fluorinated maleic anhydride and/or fluorinated maleimide are novel. Using the polymers, resist compositions featuring low absorption of F2 excimer laser light are obtained.... | 06/17/2003 |
| 5414095 | Anhydride-functional primary alkyl halides An anhydride-functional primary alkyl halide having the structure: ##STR1## wherein R1, R2 and R2 are each individually hydrogen or methyl, and the total number of carbon atoms in R1 and R2 and R... | 05/09/1995 |
| 5225573 | Intermediates to tetrabromophthalic anhydride and process therefor Tetrabromophthalic anhydride and the corresponding free acid are propared by oxidizing in the liquid phase a compound of the formula ##STR1## each of A and A' is independently selected from oxygen, OH or acetoxy; each of R and R' is independently sel... | 07/06/1993 |
| 5206392 | Facile synthesis of arylmaleic acids and anhydrides A process for making acrylmaleic acid and arylmaleic anhydride derivative useful as intermediates for the preparation of arylmaleimides in the synthesis of compounds having activity in the central nervous system. The process involves reacting arylacetonit... | 04/27/1993 |
| 5112993 | Process for the preparation of difluoromaleic anhydride A process for producing difluoromaleic anhydride by reacting sulfur trioxide with a fluorinated precursor selected from the group consisting of hexafluoro-2,5-dihydrofuran, hexafluoro-2,5-dihydrothiophene, difluoro-2,5-dihydrothiophene-2,5-dione and ... | 05/12/1992 |
| 4596867 | Disubstituted maleic anhydride compounds Di-substituted maleic anhydride compounds are disclosed of the structural formula ##STR1## wherein R and R1 are selected from the group consisting of aliphatic and phenyl moieties, and R2 is a divalent aromatic moiety. Poly... | 06/24/1986 |
| 4526986 | Halomethyl, methyl maleic anhydride and synthesis of bromomethyl, methyl maleic anhydride Quaternary ammonium compounds containing anhydride groups are prepared by halogenating dimethylmaleic anhydride and reacting the halogenated product with a tertiary amine. The products are useful as surfactants, biocides and as cosurfactants in enhanced o... | 07/02/1985 |
| 4431825 | Preparation of alkenyl succinic anhydrides Products typified by alkenyl-substituted succinic acid anhydrides are prepared by reacting olefin oligomers with anhydrides of unsaturated aliphatic polycarboxylic acids in the presence of ferric chloride, ferric bromide, stannic chloride, or phosphoric a... | 02/14/1984 |
| 4263212 | Process for preparation of substituted olefins The present invention relates to a process for the preparation of aromatic or furyl substituted olefins, which comprises reacting an olefinic compound with an aromatic compound or furan compound in the presence of carbon monoxide by using a rhodium carbon... | 04/21/1981 |
| 4086251 | Process for manufacturing polyalkenyl succinic anhydrides A process for producing alkenyl substituted anhydrides which comprises introducing one mole of polypropene or polybutene having a number average molecular weight of 200-3000, 0.8-5.0 moles of the anhydride of an unsaturated dicarboxylic acid and 5-200 ppm... | 04/25/1978 |
| 4067887 | Method of preparing dichloromaleic anhydride To prepare dichloromaleic anhydride, hexachlorobutadiene is subjected to oxidation with sulfur trioxide at a temperature ranging from 10 to 110° C in the presence of iodine or an iodine-containing compound such as an alkali metal iodide, whereafter the d... | 01/10/1978 |
| 4013683 | Process for making ଲ-bromocitraconic anhydride The title compound is made by the direct bromination of citraconic anhydride in the vapor phase at 200°-500° C. with a contact time of less than about 20 seconds. The reactants are preferably diluted with an inert solvent, such as a halogenated hydrocar... | 03/22/1977 |
| 4000162 | Dehydrohalogenated polyalkene-maleic anhydride reaction product The reaction product of a dehydrohalogenated polyalkene and a maleic anhydride prepared by the method comprising halogenating polyalkene, dehydrohalogenating the resultant halogenated polyalkene and reacting the formed dehydrohalogenated polyalkene with m... | 12/28/1976 |
| 3954812 | Polybutene composition containing halogen-containing additives and use thereof Viscous polybutenes of number average molecular weight (Mn) in the range of about 300 to about 3000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when such polybutenes contain rather small a... | 05/04/1976 |
| 3953475 | Polybutene composition containing halo-carbonyl additives Viscous polybutenes of number average molecular weight (Mn) in the range of about 300 to 3000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when reacted in the presence of rather small amoun... | 04/27/1976 |
| 3935249 | Tar reduction by inorganic halide for reaction of unsaturated anhydride and polybutene Viscous polybutenes of number average molecular weight (Mn) in the range of about 300 to about 3,000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when reacted in the presence of rather smal... | 01/27/1976 |
