Patents Represented by Attorney David L. Mossman
  • Patent number: 7550413
    Abstract: Alkaline earth metal compounds may be fluid loss control agents for viscoelastic surfactant (VES) fluids used for well completion or stimulation in hydrocarbon recovery operations. The VES fluid may further include proppant or gravel, if it is intended for use as a fracturing fluid or a gravel packing fluid, although such uses do not require that the fluid contain proppant or gravel. The fluid loss control agents may include, but not be limited to, oxides and hydroxides of alkaline earth metal, and in one case magnesium oxide where the particle size of the magnesium oxide is between 1 nanometer to 0.4 millimeter. The fluid loss agent appears to associate with the VES micelles and together form a novel pseudo-filter cake crosslinked-like viscous fluid layer that limits further VES fluid flow into the porous media. The fluid loss control agent solid particles may be added along with VES fluids.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: June 23, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: Tianping Huang, James B. Crews, James H. Treadway, Jr.
  • Patent number: 5860190
    Abstract: An expanded implement handle grip for placing over an implement handle of a spoon, fork, knife, toothbrush, hand tool, or the like has been devised which has improved concave features within the hollow, interior space thereof. These concave features, which include, but are not limited to dimples, grooves, spiral grooves, indentations, impressions, channels, depressions, hollows, slits, and the like, to permit the implement handle to be easily inserted into the grip, but nevertheless more effectively held by the expanded implement handle grip while being employed by a user with limited dexterity or strength. Other optional features such as sinuous slits, enlarged ends, and roll-inhibiting features allow the expanded implement handle grip to have improved function.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: January 19, 1999
    Inventor: Rolando M. Cano
  • Patent number: 5830833
    Abstract: Lubricants for refrigeration equipment operating with fluorocarbons as refrigerants are produced by esterification of at least one neopolyol type polyhydric alcohol with an acid component comprising 60 to 80 mol percent n-pentanoic acid, from about 40 to about 10 mol percent of at least one straight chain C.sub.6 to C.sub.10 monocarboxylic acid and from about 0 to about 30 mol percent C.sub.6 to C.sub.10 branched chain monocarboxylic acid. The resulting esters are suitable for use without lubricating oil additives.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: November 3, 1998
    Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie and Texaco Deutschland GmbH
    Inventors: Hans Dieter Grasshoff, Vladislav Synek, Harald Kohnz
  • Patent number: 5759695
    Abstract: Polyurea elastomer systems have improved adhesion to a substrate with the use of a primer that is applied first. The primer is composed of hydrophobic, primary hydroxyl-containing compound, for example, castor oil, and an isocyanate. It is not necessary to wait for the primer to cure prior to applying of the polyurea elastomer system. The primer system is particularly useful on wet substrates, where the primer penetrates the substrate prior to polyurea elastomer spraying. Regardless of whether the substrate is dry or wet, adhesion is improved.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: June 2, 1998
    Assignee: Huntsman Petrochemical Corporation
    Inventor: Dudley J. Primeaux, II
  • Patent number: 5753765
    Abstract: Polymerizable oligo- and/or polyalkenoic acids are disclosed which are block polymers of different polyalkenoic acids or their derivatives and/or conjugated dienes. These oligo-/polyalkenoic acids are characterized in that they have at least one sequence with acid functions or protected acid functions in the side group and at least one sequence with olefinic double bonds in the side group of the alcohol component of the esters or the amine component of the amides. The use of said polymerizable oligo- and/or polyalkenoic acids for dental/medical purposes is also described.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: May 19, 1998
    Assignee: Ernst Muhlbauer KG
    Inventor: Sven Arne Thomsen
  • Patent number: 5731397
    Abstract: Spray polyurea elastomer systems have improved adhesion to a substrate with the incorporation of a functional alkoxy silane and water. Such systems typically also include a quasi-prepolymer of an isocyanate and an active hydrogen-containing material, and at least one amine resin, and preferably an amine-terminated chain extender. The system may also benefit from the incorporation of a higher than usual proportion of 2,4'-isomer methylene diisocyanate (MDI). The viscosity of the various components, as well as various processing characteristics, may be improved by the addition of an alkylene carbonate. The spray polyurea elastomer systems of this invention also have improved abrasion and impact resistance.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: March 24, 1998
    Assignee: Huntman Petrochemical Corporation
    Inventors: Dudley J. Primeaux, II, Kenneth C. Anglin
  • Patent number: 5698746
    Abstract: Polyether polyols having reduced terminal unsaturation are prepared in a process comprising a first step of contacting a polyether having allyl terminal unsaturation with an isomerization catalyst whereby the allyl terminal unsaturation of the polyether is reduced by at least 90% conversion to propenyl terminal unsaturation in one step and, in a final step, the resulting polyether product of the first step is contacted with an acid catalyst whereby a substantial amount of the propenyl terminal unsaturation of the polyether is removed and the corresponding polyether having an additional hydroxyl group is obtained.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: December 16, 1997
    Assignee: Huntsman Petrochemical Corporation
    Inventor: Timothy L. Lambert
  • Patent number: 5693692
    Abstract: A new depressant for use in enhanced separation of polymetallic sulphides is described. The depressant agent is used in conjunction with conventional collector agents and frothing agents in the flotation separation of copper, nickel, lead, zinc sulphides by depressing iron sulphides such as pyrrhotite, pyrite and marcasite in the tailing. The depressant consists of a chemically-modified carbohydrate polymer, a polyacrylate and low foaming lignin sulphonate.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: December 2, 1997
    Assignees: Huntsman Petrochemical Corp., Falconbridge Limited
    Inventors: Srdjan Bulatovic, Tim M. Jessup, James F. Jackson, Gordon Leighton
  • Patent number: 5681916
    Abstract: Urea-modified, highly reactive phenolic resins useful as center-layer bonding agents in the manufacture of particleboard are provided by condensing phenol and formaldehyde until shortly before gelation takes place such that, after addition of urea, relatively low-alkaline, urea-modified phenolic resins are obtained which my optionally be stored and to which, shortly before processing them into glues for center-layer particles, alkali is added in sufficient quantities to ensure rapid cross-linking of the phenolic resin.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: October 28, 1997
    Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie
    Inventors: Adolf Buschfeld, Matthias Lattekamp, Manfred Gramse, Hans-Jurgen Krezmin
  • Patent number: 5663174
    Abstract: Aromatic sulfonamide derivatives, particularly benzenesulfonamide, 4-fluorobenzenesulfonamide, 5-chloro-1-naphthalenesulfonamide and 5-isoquinolinesulfonamide derivatives are provided that inhibit Ca.sup.2+ -dependent enzymes and proteins such as Phospholipase A.sub.2, protein kinases such as Protein Kinase C, and inhibit membrane fusion, thereby being a valuable drug for the treatment of inflammation, arthritis, infarction, nephritis and many other types of tissue injury.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: September 2, 1997
    Assignee: Pharno-Wedropharm GmbH
    Inventor: Raymond Dumont
  • Patent number: 5629277
    Abstract: A composition for removing paint, particularly graffiti, is described which contains an alkylene carbonate, which may be propylene carbonate, butylene carbonate or mixtures thereof; propylene glycol as a hydrotrope, and a polypropylene glycol having a molecular weight of at least 200. In one embodiment, the composition also contains a hydroxyalkylcellulose thickener, for example, at least 0.5 volume percent hydroxymethylcellulose may be present. In another embodiment, the composition contains no N-methylpyrrolidone, amine, DMSO, isocetyl alcohol or surfactant, unlike some prior graffiti-removing compositions.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: May 13, 1997
    Assignee: William L. Brown
    Inventor: Martin J. Plishka
  • Patent number: 5616811
    Abstract: Etheramine alkoxylates are described which have the formula: ##STR1## where R.sup.1 is a straight or branched alkyl, aryl or alkylaryl group of 6 to 22 carbon atoms; R.sup.3 are independently hydrogen or C.sub.1 to C.sub.3 alkyl; m averages from about 1 to about 20; and x and y each independently average from about 0 to 30, where x+y averages from about 2 to about 60. These etheramine alkoxylates have surfactant properties. Further, they may be quaternized to make other compounds which will have useful surfactant properties.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 1, 1997
    Assignee: Huntsman Petrochemical Corporation
    Inventors: Jeffrey J. Vipond, John M. Larkin, Terry L. Renken, Howard M. Stridde
  • Patent number: 5588390
    Abstract: A universal cavitation plate system for providing an after-market cavitation plate on the lower unit of virtually all boat motors having lower units and propellers. Each universal cavitation plate assembly has a cavitation plate with a longitudinal slot for receiving the lower unit of the boat motor, an elastomeric insert for cushioning or shock absorption between the lower unit and the cavitation plate, and a filler piece for at least partially filling the exposed space of the longitudinal slot between the rear of the boat and the trailing edge of the cavitation plate.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: December 31, 1996
    Inventor: Leon D. French
  • Patent number: 5519154
    Abstract: A process for producing ethoxylated ester surfactants in high yield has been discovered which employs no halogen-containing reactants or intermediates. Allyl alcohol is reacted with ethylene oxide to give an allyl alcohol ethoxylate; the ethoxylate in turn is reacted with a bisulfite salt (e.g. sodium metabisulfite) to give an ethylene glycol propanesulfonate or polyethylene glycol propanesulfonate in high yield. The propanesulfonate is then reacted with a fatty acid to give the ethoxylated ester surfactant.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: May 21, 1996
    Assignee: Huntsman Corporation
    Inventor: Carter G. Naylor
  • Patent number: 5496894
    Abstract: The present invention provides polymer polyols and a method for preparing polymer polyols which have (1) exceptional dispersion stability, especially at high styrene contents, and (2) substantially smaller particle sizes than polymer polyols having equivalent viscosity. In a preferred embodiment of the present invention, a first reaction product is obtained by feeding the following materials to a first continuous reactor in the presence of a free radical initiator or catalyst: (a) less than about 50 wt. % of a total monomer proportion or monomer mixture, preferably comprising styrene/acrylonitrile at a ratio preferably greater than about 50/50 wt. %; (b) at least about 50 wt. % of a total base polyol proportion; (c) a majority of a precursor stabilizer; and, (d) a polymer control agent (PCA).
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: March 5, 1996
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Frank E. Critchfield, Donald W. Simroth, Stuart L. Watson
  • Patent number: 5474714
    Abstract: The present invention relates to hydraulic fluids which are particularly intended for shock absorption and level controlling applications in vehicles. Hydraulic fluids are provided which substantially consist of esterification products of monosaturated fatty acids and 2-alkyl-1-alkanols. The claimed fluids comply with the requirements made on industrial hydraulic media and are particularly outstanding by their good biodegradability.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: December 12, 1995
    Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie
    Inventors: Dietrich Pirck, Hans-Dieter Grasshoff
  • Patent number: 5449725
    Abstract: This invention presents a series of polyfunctional polymers useful as deinking agents. The polymers, which generally have molecular weights in the 2,000-100,000 range, can be used to effectively separate and remove ink in a variety of deinking processes, including flotation, wash, and mechanical, resulting in fibers of superior brightness.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: September 12, 1995
    Assignee: Huntsman Corporation
    Inventors: Ratana Kanluen, Brigitte H. Licht
  • Patent number: 5442034
    Abstract: Spray polyurea elastomers are disclosed made from an (A) component and a (B) component, where the (A) component has a quasi-prepolymer made from an isocyanate and an active hydrogen-containing material, such as a polyoxyalkylenepolyamine. The (B) component includes an amine resin, such as an amine-terminated polyoxyalkylene polyol which may be the same or different from the polyoxyalkylene polyamine of the quasi-prepolymer. The viscosity of the (A) component is reduced by the inclusion of an organic, alkylene carbonate, such as ethylene carbonate, propylene carbonate, butylene carbonate, dimethyl carbonate, and the like. The alkylene carbonate also serves as a compatibilizer between between the two components, thus giving an improved mix of the system.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: August 15, 1995
    Assignee: Huntsman Corporation
    Inventor: Dudley J. Primeaux, II
  • Patent number: 5402111
    Abstract: The invention detects the presence of a liquid or liquid flow, and it is used to control pumping of a well when the quantity of liquid being discharged by the pump per stroke is much less than the volumetric displacement of the pump.
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: March 28, 1995
    Inventor: Charlie J. Hubbard, Jr.
  • Patent number: 5399663
    Abstract: An amine terminated random copolymer containing ethylene oxy/propylene oxy segments may be reacted with hexamethylene diamine and adipic acid monomers to make improved poly(etheramide) segmented block copolymers. Ordinarily, poly(propylene glycol) diamines tend to phase separate under these conditions and polyamide-6,6 could not be so modified. The resultant poly(etheramide) segmented block copolymer has improved impact performance, reduced modulus and lower glass transition as contrasted with the non-modified polyamide-6,6.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: March 21, 1995
    Assignee: Huntsman Corporation
    Inventor: Richard J. Clark, II