Search Patents
  • Method for producing acrolein and/or acrylic acid from propane
    Patent number: 6388129
    Abstract: In a process for the preparation of acrolein and/or acrylic acid from propane, the propane is subjected, in a first reaction stage, to a partial oxydehydrogenation with molecular oxygen under homogeneous and/or heterogeneous catalysis to give propene and the product gas mixture formed in the first reaction stage is then used for the preparation of acrolein and/or acrylic acid by gas-phase catalytic propene oxidation.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: May 14, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Otto Machhammer, Andreas Tenten, Harald Jachow, Susanne Haupt, Heiko Arnold, Signe Unverricht
  • Process for preparing cyclic thioamides
    Patent number: 6388127
    Abstract: The present invention relates to a process for preparing a compound of the formula wherein b, Y and R3 are defined as above, useful for preparing novel aralkyl and aralkylidene heterocyclic lactams and imides which are selective agonists and antagonists of serotonin 1 (5-HT1) receptors.
    Type: Grant
    Filed: March 28, 2000
    Date of Patent: May 14, 2002
    Assignee: Pfizer INC
    Inventors: George Joseph Quallich, Jeffrey William Raggon, Paul D. Hill
  • Organic base hydrogenofluorosulphonates, their use in releasing organic bases from their fluorohydrate, method of preparation thereof, compound containing them
    Patent number: 6388126
    Abstract: The invention features the use of flourosulphonates to release the organic bases from their fluorohydrate. This use is characterised in that a hydrogenofluorosulphonate of an organic base is formed and in that the hydrofuoric acid which is associated with the said base or with one of its precursors is separated therefrom. The invention is useful in organic synthesis applications.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: May 14, 2002
    Assignee: Rhodia Chimie
    Inventors: Laurent Saint-Jalmes, Marcel Morel
  • Method of synthesis of betaine esters
    Patent number: 6384266
    Abstract: The present invention relates to an environmentally acceptable method of producing glycine betaine esters that produces no toxic by-products during the synthesis. The method produces only product, recyclable material for reuse in the process, and recovered material which can be sold for uses, such as fertilizer.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: May 7, 2002
    Assignee: Applied Power Concepts, Inc.
    Inventors: William A. Farone, Tracy Palmer
  • Method for orthometalation of a carbocyclic aromatic derivative bearing at least an electron donor group
    Patent number: 6384273
    Abstract: The invention concerns a method for orthometalation of a carbocyclic aromatic derivative bearing at least an electron donor group, characterised in that it consists in reacting said carbocyclic aromatic derivative with an efficient amount of at least one alkaline metal in the presence of a compound of formula (I): RX, wherein: R represents a hydrocarbon radical having 1 to 20 carbon atoms which can be a saturated or unsaturated, linear or branched, acyclic aliphatic radical; a saturated or unsaturated, monocyclic or polycyclic cycloaliphatic radical; a saturated or unsaturated, linear or branched aliphatic radical bearing a cyclic substituent; and X represents a bromine or chlorine atom.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: May 7, 2002
    Assignee: Rhodia Chimie
    Inventors: Virginie Pevere, Jean Roger Desmurs, Charles Mioskowski, Alain Wagner, Arnaud Gissot
  • Treatment of formaldehyde-containing mixtures
    Patent number: 6384268
    Abstract: A process for the removal of formaldehyde species from a liquid carboxylic acid or carboxylic acid ester stream which forms a two-phase mixture with water is disclosed which comprises the step of subjecting the liquid organic mixture to at least one liquid liquid extraction stage wherein water is used as an extractant to produce an organic phase stream which is substantially formaldehyde free and an aqueous phase stream which contains substantially all of the formaldehyde in the output streams from the liquid liquid extraction. The process is particularly useful for reducing the formaldehyde content of a methyl methacrylate product stream.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: May 7, 2002
    Assignee: Ineos Acrylics UK Limited
    Inventors: William David Parten, Stephen Patrick Harrison, John Stuart Martin
  • Geranic acid derivatives
    Patent number: 6384242
    Abstract: 4-Methyl-4-(4-mlthylpent-3-en-1-yl)-2-oxetanone of formula (1): or its oligomer is an intermediate product for the preparation of a series of geranic acid derivatives, which are important synthetic building blocks in the preparation of perfumes and fragrances.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: May 7, 2002
    Assignees: Firmenich SA, Lonza AG
    Inventors: Peter Fankhauser, Paul Hanselmann, Barry Jackson
  • Process for purification of (meth)acrylic acid
    Patent number: 6380427
    Abstract: A process for purification of (meth)acrylic acid which comprises adding to a crude (meth)acrylic acid one or two or more polar organic substances as a second component at a concentration of 1-35% by weight, crystallizing (meth)acrylic acid from the resulting (meth)acrylic acid solution, and separating the precipitated crystal of (meth)acrylic acid and a mother liquor from each other.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: April 30, 2002
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Seiji Miyazaki, Akira Ogawa, Yasutaka Nakashima, Yoshiaki Kobayashi, Mikiyoshi Araki
  • Stereoselective process for alkyl phenylglycolic acids
    Patent number: 6376684
    Abstract: A process for preparing an alkyl phenylglycolic acid is disclosed. It follows the sequence of condensing a substituted acetaldehyde with mandelic acid to provide a 5-phenyl-1,3-dioxolan-4-one, which is condensed with an alkyl ketone or aldehyde to provide a 5-(1-hydroxyalkyl)-5-phenyl-1,3-dioxolan-4-one, which is dehydrated to a 5-(1-alkenyl)-5-phenyl-1,3-dioxolan-4-one. The 5-(1-alkenyl)-5-phenyl-1,3-dioxolan-4-one may be hydrolyzed and reduced to an &agr;-alkylphenylglycolic acid or the hydrolysis and reduction steps may be reversed. The process enables the production of single enantiomers of cyclohexylphenylglycolic acid (CHPGA). An analogous process for racemic CHPGA is disclosed employing racemic mandelic acid and acetone. Novel intermediates in the process are also disclosed.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: April 23, 2002
    Assignee: Sepracor Inc.
    Inventors: Chris Hugh Senanayake, Paul T. Grover
  • Alicyclic compound
    Patent number: 6376700
    Abstract: An alicyclic compound of the formula (1) is disclosed: wherein R1 and R2 each independently is a hydroxyl group, a C1-8 hydroxyalkyl group, or a C3-8 hydroxycycloalkyl group; R3, R4 and R5 each independently is a hydrogen, a C1-8 hydroxyalkyl group, a C1-6 carboxylic acid or a C3-8 carboxylic acid ester; k is an integer of 0, 1, 2, 3, 4, 5 or 6. The compound of the formula (1) can be applied to dissolution inhibitors for preparing positive photoresist composition.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: April 23, 2002
    Assignee: Everlight USA, Inc.
    Inventors: Shang-Wern Chang, Yen-Cheng Li, Shang-Ho Lin, Wen-Chieh Wang
  • Naphthyoxyalkyl(meth)acrylates with high refractive indices and low glass transition temperatures
    Patent number: 6376704
    Abstract: Naphthyloxyalkyl(meth)acrylate monomers having a high refractive index and whose respective homopolymer has a low glass transition temperature.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: April 23, 2002
    Assignee: 3M Innovative Properties Company
    Inventor: David B. Olson
  • Synthesis of 1,8-dichloro-anthracene analogues and pharmaceutical compositions based thereon
    Patent number: 6372785
    Abstract: The invention provides novel anthracene compounds useful in the treatment of allergic, inflammatory, and tumor conditions and therapeutic compositions containing such compounds or their pharmaceutically acceptable salts. The compounds of the invention are novel 1,8-dichloro-anthracene derivatives or analogs thereof. According to the practice of the invention, there are provided 9-substituted 1,8-dichloro-anthracene compounds of the Formula III: wherein R represents a straight or branched chain alkyl group having 1-6 carbons and may be substituted with one or more of the groups R1, wherein R1 represents the groups selected from COOH or an ester alky thereof having 1 to 4 carbons, —OH, halogen, NO2, CH3O, CH3CH2O, phenyl and CH3CH2CH2O.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: April 16, 2002
    Assignee: Keith Chan, President GloboAsia, LLC
    Inventor: Hsu-Shan Huang
  • Water soluble complexes
    Patent number: 6372934
    Abstract: The invention relates to a series of novel salt complexes that are made by neutralizing a fatty ammonium compound which is cationic with an anionic compound, producing a salt complex. The compounds of the present invention are water soluble, non-irritating to the eye and skin and are well suited to personal care applications.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: April 16, 2002
    Assignee: BioSil Research Institute
    Inventors: Anthony J. O'Lenick, Jr., Charles W. Buffa
  • Process for preparing certain phenyl urea compounds
    Patent number: 6372933
    Abstract: This invention relates to a process for making certain phenyl urea compounds by using a Lewis acid to effect the ring opening of a benzoxazolinone by an amine.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: April 16, 2002
    Assignee: SmithKline Beecham Corporation
    Inventors: Neil H. Baine, Ann Marie Eldridge, Marvin Sungwhan Yu
  • Polyenepolycarboxylic acids, derivatives thereof with respect to carboxyl groups, or salts of these
    Patent number: 6372943
    Abstract: Polyenepolycarboxylic acids represented by the following formula (1); (wherein n represents an integer of 0 to 5 and m represents an integer of 1 or 2, provided m is 1 when n is 0), or derivatives thereof at their carboxyl group(s) or their salts. The above compounds originate from natural products and are capable of exhibiting excellent dispersing ability.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: April 16, 2002
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Shinobu Kasuga, Toshihito Kakiuchi, Ryo Yamanishi, Kazuki Okada
  • Copolymer resin, preparation thereof, and photoresist using the same
    Patent number: 6372935
    Abstract: The present invention relates to a copolymer resin for ultra-shortwave light source such as KrF or ArF, process for preparation thereof, and photoresist comprising the same resin. The copolymer resin according to the present invention is easily prepared by conventional radical polymerization due to the introduction of norbornyl(meth)acrylate unit to a structure of copolymer for photoresist. The resin has high transparency at 193 nm wavelength, provides increased etching resistance and enhanced adhesive strength due to a hydrophilic functional group in the norbornyl group, and shows excellent resolution of 0.15 Fm in practical experiment of patterning.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: April 16, 2002
    Assignee: Hyundai Electronics Industries Co., Ltd.
    Inventors: Min Ho Jung, Jae Chang Jung, Cheol Kyu Bok, Ki Ho Baik
  • Synthesis of 4-phenylbutyric acid
    Patent number: 6372938
    Abstract: A method of synthesizing compounds of Formula I: by reacting aromatic compounds with butyrolactone, followed by neutralization with base. The reaction can be conducted in the presence of a catalyst. Preferred catalysts are Lewis acids. A preferred product of Formula I is 4-phenylbutyric acid, which is obtained by the reaction of benzene with butyrolactone in the presence of aluminum chloride, followed by neutralization with base.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: April 16, 2002
    Inventors: Stanislaw R. Burzynski, Leszek Musial
  • Process for manufacture of in vivo stain composition
    Patent number: 6372904
    Abstract: A process for synthesizing 2-amino-5-dimethlyaminophenyl thiosulfonic acid comprises the step of oxidizing N,N′-dimethyl-&rgr;-phenylene-diamine in the presence of a source of thiosulfate ions, while maintaining the temperature of the reaction mixture not higher than about 10° C. This compound is useful as an intermediate in the synthesis of toluidine blue O. A process for manufacturing toluidine blue O with improved yield, includes the step of preparing the intermediate 2-amino-5-diethylaminopropyl thiosulfonic acid according to the above described procedure.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: April 16, 2002
    Assignee: Zila, Inc.
    Inventor: Douglas D. Burkett
  • Plasticized polyvinyl chloride compound
    Patent number: 6369264
    Abstract: A highly flame retardant plasticized polyvinyl chloride compound (PVC) comprises a mixture of dialkyl tetrachlorophthalate and dialkyl tetrabromophthalate and is characterized by an absence of brittleness, and substantial flexibility at low temperatures as required for PVC formed jackets and insulation for wire and cable products.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: April 9, 2002
    Inventors: James F. Day, James J. Good
  • Benzoic acid intermediates to 4-benzoylisoxazole herbicides
    Patent number: 6369270
    Abstract: Compound of the formula are useful as intermediates to new 4-benzoylisoxazoles.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: April 9, 2002
    Assignee: Rhone Poulenc Agriculture Limited
    Inventors: Angela Jacqueline Bailey, Michael Gingell, David William Hawkins