Patents Represented by Attorney, Agent or Law Firm Lucas & Just
  • Hydraulic cement slurry
    Patent number: 4933031
    Abstract: Hydraulic cement slurry for use in cementation of oil wells containing hydraulic cement, 5-100% microsilica based on the weight of cement, 2-200% light weight aggregate with a real particle density between 0.1 and 1.5 g/cm.sup.3 based on the weight of the cement, 0-5% thinner (dry weight) based on the weight of the cement, 0-10% fluid loss additive (dry weight) based on the weight of the cement, and water in such an amount that the cement slurry has a density between 0.8 and 2.0 g/cm.sup.3.The cement slurry according to the present invention is gas tight and can thereby be used for cementation of oil well in fields having gas containing formations.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: June 12, 1990
    Assignee: Elkem a/s and Den norske stats oljeselskap a.s.
    Inventors: Nils Blomberg, Eldar O. Dingsoyr, Per J. Svenkerud, Bjorn Vassoye
  • Method for adding silica fume to dry shotcrete mixture
    Patent number: 4931098
    Abstract: A method for adding silica fume to a dry shotcrete mixture wherein the silica fume is added together with the water supplied to the dry mixture in the spray nozzle.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: June 5, 1990
    Assignee: Elkem a/s
    Inventors: Tore Danielssen, Eike Herfurth
  • Process of making a golf ball cover
    Patent number: 4929407
    Abstract: The process uses a vented barrel to decrease the mositure content of the ionomeric resin cover stock prior to injection molding of a golf ball cover or the formation of semi-circular cover halves. The vent is located at a point on the barrel where the temperature of the melted ionomeric resin melt is between 400.degree. F. (204.degree. C.) and 500.degree. F. (260.degree. C.). The venting drops the moisture content of the ionomeric resin to below 800 ppm.
    Type: Grant
    Filed: December 6, 1988
    Date of Patent: May 29, 1990
    Assignee: Acushnet Company
    Inventor: John Giza
  • Tiltable ladle and cover for such ladle
    Patent number: 4928862
    Abstract: The present invention relates to a tiltable ladle having a cover and a suspension frame said suspension frame comprising two lifting arms rotatably connected to trunnions affixed to the outside of the wall of the ladle and a horizontal beam above the ladle equipped with a hook. The top of the ladle and the ladle cover are formed as segments of a cylinder, the focal axis at these cylinder segments being the pivotal axis at the ladle, and the cover being affixed to the suspension frame.According to another embodiment the focal axis of these cylinder segments are placed at one side of, above, at, or blow the pivot axis of the ladle, the ocover being affixed to the suspension frame, in such a way that the cover closes the ladle when the ladle and the suspension arms are in vertical position.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: May 29, 1990
    Assignee: Elkem a/s
    Inventor: Douglas S. White
  • Tensioning roller, and device provided with such a tensioning roller
    Patent number: 4928593
    Abstract: Described is a tensioning roller which can expand under the influence of an inflating pressure and which is used for supporting a medium which is to be treated with high-energy radiation.Such a tensioning roller comprises at the outside a thin walled metal cylinder or sleeve which for the purpose of achieving an increased radial expandability according to the invention is provided with axial slots which are evenly distributed around the periphery of the sleeve.The invention also concerns a device for treating a medium with high-energy radiation which comprises a tensioning roller as described.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: May 29, 1990
    Assignee: Schablonentechnik Kufstein GmbH
    Inventor: Siegfried Ruckl
  • Sugar ester synthesis
    Patent number: 4927920
    Abstract: This method for making sugar esters entails first reacting a sugar and an ter of that sugar having a degree of substitution greater than 2 with a Lewis acid or Lewis base catalyst in an organic solvent to form a sugar ester having a degree of substitution up to 2 and recovering the sugar ester having a degree of substitution up to 2 at ambient temperature. The recovery step must be conducted at a temperature below the distillation or boiling temperature of the organic solvent or else the DS of the resulting sugar ester will be greater than 2. This process is especially suited for sucrose esters. The reaction between the sugar and the sugar ester is conducted in the absence of a methyl ester of a fatty acid.
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: May 22, 1990
    Assignee: Nebraska Department of Economic Development, State of Nebraska, U.S.A.
    Inventors: Frederick W. Wagner, Rebecca S. de la Motte, Maria A. Dean
  • Process for preparing polynucleotides
    Patent number: 4927755
    Abstract: This invention relates to a process of preparation of nucleotide polymers wherein a lysate of a bacterial culture is passed successively through three columns (ion exchange resin, hydrophobic resin and molecular sieve), whereby there is obtained a substantially pure polynucleotidephosphorylase solution.Polymerization of this agent leads to non toxic and non pyrogen products.This invention relates also to products thus obtained and to therapeutic compositions containing the same.
    Type: Grant
    Filed: November 1, 1988
    Date of Patent: May 22, 1990
    Assignee: Societe de Conseils de Recherches et d'Applicatios Scientifiques (S.C.R.A.S.)
    Inventors: Chabrier De Lassauniere, Acaye S. Colote
  • 2-methoxycarbonyl substituted N,N'-di-(trimethoxybenzoyl) piperazines, process for preparing the same and therapeutical compounds containing them
    Patent number: 4927825
    Abstract: This invention relates to piperazine derivatives having the general formula I: ##STR1## wherein Y stands for ##STR2## and Z represents various substituents, to a preparation process of said compounds and to therapeutic compositions containing them as an active ingredient.
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: May 22, 1990
    Assignee: Societe de Conseils de Recherches et d'Applications Scientifiques (S.C.R.A.S.)
    Inventors: Eduardo Pirotzky, Georges Dive, Jean-Jacques Godfroid, Francoise Heymans
  • 2-Carbonyl substituted N,N'-di-(trimethoxygenzoyl)piperazines, process for preparing the same and therapeutical compounds containing them
    Patent number: 4923870
    Abstract: This invention relates to piperazine derivatives having the general formula I: ##STR1## wherein Y stands for ##STR2## and Z represents various substituents, to be a preparation process of said compounds and to therapeutic compositions containing them as an active ingredient.
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: May 8, 1990
    Assignee: Societe de Conseils de Reserches et d'Applications Scientifiques
    Inventors: Pierre Braquet, Georges Dive, Jean-Jacques Godfroid, Francoise Heymans, Eduardo Pirotzky
  • Non-contact testing of photovoltaic detector arrays
    Patent number: 4924096
    Abstract: The present method for non-contact testing of infrared photovoltaic detectors employs a probe which is positioned a distance "d" from a detector contact to form a capacitance between the probe and the detector. The probe signal is amplified by a preamplifier and the diode is excited both electrically, through the common contact, and optically with a known infrared signal. The probe position is controlled by measuring the probe to detector capacitance. Electrical and electro-optical detector parameters can be determined using standard AC circuit analysis techniques.
    Type: Grant
    Filed: July 13, 1988
    Date of Patent: May 8, 1990
    Inventors: Jacek A. Mroczkowski, Marion B. Reine, Neal R. Butler
  • Stapling machine
    Patent number: 4923107
    Abstract: An improved stapling machine is disclosed which comprises a support base with a one-piece configuration capable of flexing and which defines two wings, one for support which forms a slightly sloping anvil and another for carrying the stapling-machine head/staple holder, which are connected together via a curved core; and a guide rule, fitted on said sloping anvil and defining the point-bending cavity opposite the stapling head.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: May 8, 1990
    Assignee: Olave, Solozabal Y CIA, S.A.
    Inventor: Jorge G. Echevarria
  • Shut-down valve
    Patent number: 4921003
    Abstract: Shut-down valve intended for use in a subwater/subliquid position, for instance in subsea pipelines for liquid/gas. It is an object to prevent the medium surrounding the valve, to penetrate the pipesystem which is being served by the valve, and at the same time counteract the through-flowing fluid to be released into the surrounding medium when the valve is to undergo maintenance. The valve comprises a valve housing comprising a cylindrical valve chamber (12,13), which is intended for being oriented along the direction of flow F of the liquid/gas, and a radially arranged valve chamber (14), which is closable with a removable bonnet (9), and also a clack-valve body (3) which is movable between a closed position and an open position.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: May 1, 1990
    Assignee: Den norske stats olkeselskap
    Inventor: Knut Horvei
  • Aminoacylates of glycerol acetal
    Patent number: 4921865
    Abstract: The invention relates to new aminoacylates of glycerol acetal of the general formula I ##STR1## wherein R.sub.1 represents a substituted phenyl group or a group of the formula C.sub.m H.sub.2m+1, m being an integer of from 9 to 25,R.sub.2 represents a hydrogen atom, a phenyl group or a group of the formula C.sub.n H.sub.2n+1, n being an integer of from 1 to 10,p is a integer of from 3 to 10, ##STR2## represents a nitrogen containing heterocyclic group and X.sup..crclbar. means a pharmaceutically acceptable anion to a preparation process of said compounds and to therapeutic compositions of matter containing the same.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: May 1, 1990
    Assignee: Societe de Conseils de Recherches et d'Applications Scientifiques (S.C.R.A.S.)
    Inventors: Colette Broquet, Pierre Braquet
  • Process for producing modified cyclodextrins
    Patent number: 4920214
    Abstract: The present invention is directed to a process for modifying and increasing the water solubility of cyclodextrins in a moderate controlled progressive reaction and in particular to producing derivatives of cyclodextrins in a substantially anhydrous reaction with an alkylene carbonate such as ethylene carbonate in an alkaline environment.
    Type: Grant
    Filed: April 16, 1986
    Date of Patent: April 24, 1990
    Assignee: American Maize-Products Company
    Inventor: Robert B. Friedman
  • Chewing tobacco composition and process for producing the same
    Patent number: 4917161
    Abstract: A miniature plug of chewing tobacco made from 25 to 80% by weight tobacco on a dry basis and 75 to 20% casing solids and having a tensile strength of greater than 150 g/cm is disclosed. The high tensile strength allows for the miniature plug to be satisfactorily processed. Such a plug can be made with the use of gelatin in the casing solution. The casing includes as an essential element gelatin.
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: April 17, 1990
    Assignee: Helme Tobacco Company
    Inventor: John Townend
  • Golf ball
    Patent number: 4915390
    Abstract: A golf ball with improved distance is disclosed. The golf ball has a relatively low spin velocity coupled with a particular dimple number, diameter, depth and arrangement. The ball is characterized by a lower flight trajectory and longer total distance. In a preferred embodiment (Example 10, shown in FIG. 2), the dimples marked 18 have a diameter of 0.140 inches.+-.0.002 inches, while the balance of the dimples have a diameter of 0.160 inches.+-.0.002 inches.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: April 10, 1990
    Assignee: Acushnet Company
    Inventors: William Gobush, Raymond A. Berard, Robert A. Brown, John W. Jepson
  • Quinoline derivatives, their preparation and therapeutic compositions containing the same
    Patent number: 4914110
    Abstract: The invention relates to new quinoline derivatives of the formula: ##STR1## wherein R stands for C.sub.2 H.sub.5, C.sub.2 H.sub.4 F, CH.sub.2 -O-CH.sub.2 -CH.sub.2 OH, ##STR2## to a process for their preparation comprising reacting, for 12-24 hours, at 70.degree.-95.degree. C., in dimethylformamide, the 1,4-dihydro- 3-ethoxycarbonyl- 6,8- difluoro-4-oxo-quinoline with an excess of RX (2-5 mol of RX for one mol of quinoline), in the presence of K.sub.2 CO.sub.3 and subsequently hydrolysing the obtained 3-ester by HCl under reflux conditions and to pharmaceutical compositions comprising at least one 1,4-dihydro- 3-carboxy- 6,8-difluoro- 1-R-4-oxo-quinoline derivative in admixture with a pharmaceutically acceptable diluent or carrier.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: April 3, 1990
    Assignee: Societe de Conseils de Recherches et d'Applications Scientifiques
    Inventor: Andre Esanu
  • Mono-atmospheric chamber
    Patent number: 4913590
    Abstract: A mono-atmospheric chamber module for placing on the top of a Christmas tree (1) in a well-head, to keep equipment and personnel at surface conditions during the execution of varied well operations. The chamber module comprises a mainly oblong cylindrical mantle (4) with associated base-ends. An opening (7) for tight engagement with the top of the Christmas tree (1) is arranged in the lower base-end (5). The upper base-end (6) is detachable. Inside the module, a pressure resistant personnel chamber (14) is arranged with direct connection to an access opening (19) placed in the cylinder mantle (4).
    Type: Grant
    Filed: January 5, 1988
    Date of Patent: April 3, 1990
    Assignee: Den norske stats oljeselskap a.s
    Inventors: Bjornar Svenning, Per Brevig
  • Octahydro indenofuran derivatives and their therapeutic compositions
    Patent number: 4904693
    Abstract: This invention relates to indenofuran derivatives of the formula: ##STR1## wherein R stands for H or for a ##STR2## group optionally substituted on the phenyl ring by Alk, OH or OAlk, Alk being a lower straight or branched alkyl group up to C.sub.5, to the preparation of these compounds and to therapeutic compositions containing the same in the field of anaphylaxis.
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: February 27, 1990
    Assignee: Societe de Conseils Recherches et d'Applications Scientifiques
    Inventors: Pierre Braquet, Andre Esanu
  • Access apparatus connecting a first and second chamber at great water depths
    Patent number: 4904117
    Abstract: Access apparatus between a first and second chamber (1, 2) located at greater water depths, which chambers have equal pressure, lower than the water pressure, particularly an access apparatus (4) between an underwater vessel (1) and a chamber (2) at an installation on the seabed. The invention is characterized in that it comprises first and second concentric tubular elements (7, 5) designed for engagement as a telescopic cylinder, a hydraulic system for controlled actuation of the telescopic cylinder and at least on the free end of the first tubular element (7), a spherical mounted mating flange (12).
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: February 27, 1990
    Assignee: Den Norske Stats Oljeselskap A.S.
    Inventors: Bjornar Svenning, Rune Swensson, Lars Truedsson