Patents Represented by Law Firm Millen, Raptes & White
  • Halogenated aralkyl ethers
    Patent number: 3975448
    Abstract: The invention relates to novel halogenated alkylaryl ethers having at least one fluoroalkyl grouping, which have very good thermal stability and chemical resistance, and to a process for producing the ethers.
    Type: Grant
    Filed: August 31, 1973
    Date of Patent: August 17, 1976
    Assignee: Tessenderlo Chemie S.A.
    Inventors: Yvon Delaunois, Claude Wilante
  • Supported catalyst for oxidizing methanol to formaldehyde and its manufacturing process
    Patent number: 3975302
    Abstract: Process for manufacturing a supported catalyst whose active phase contains mainly molybdenum and iron by impregnating a carrier with an aqueous solution of alkanolamine and a complex of the active phase elements, drying and thereafter roasting the impregnated carrier.
    Type: Grant
    Filed: September 3, 1974
    Date of Patent: August 17, 1976
    Assignee: Institut Francais du Petrole, des Carburants et Lubrifiants et Entreprise de Recherches et d'Activities Petrolieres Elf
    Inventors: Philippe Courty, Andre Sugier, Jean-Francois Le Page
  • Sulfur-containing ring compounds
    Patent number: 3975403
    Abstract: Compounds of the formula ##SPC1##Wherein R.sub.1 is COOH, COO-alkyl, CH.sub.2 OH or CH.sub.2 -alkanoyl; R.sub.2 is CH.sub.3 or C.sub.2 H.sub.5 ; R.sub.3 is H, F, Cl or Br; and Y is CH.sub.2, O or S, at least one Y being S, and the physiologically acceptable salts thereof, possesses antiphlogistic activity.
    Type: Grant
    Filed: September 10, 1973
    Date of Patent: August 17, 1976
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Joachim Gante, Werner Mehrhof, Albrecht Wild
  • Recovery of gaseous components from scrubbing liquid
    Patent number: 3975172
    Abstract: Process for the recovery of one or more components of a raw gas, absorbed by the scrubbing liquid during a physical gas scrubbing step, by expanding the laden scrubbing liquid, characterized in that the expanded, laden scrubbing liquid is stripped, before its final regeneration, with a gas consisting exclusively of one or more components of the raw gas and essentially free of the components to be recovered and to be scrubbed out.
    Type: Grant
    Filed: March 14, 1974
    Date of Patent: August 17, 1976
    Assignee: Linde Aktiengesellschaft
    Inventor: Gerhard Ranke
  • Pest control agent
    Patent number: 3973944
    Abstract: 3-Cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2) and compositions containing the same, are useful for controlling the growth of undesirable pest plant growth, e.g., algae, weeds and undesirable grasses, when applied to the locus to be protected.
    Type: Grant
    Filed: December 15, 1970
    Date of Patent: August 10, 1976
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Dietrich Erdmann, Gerhart Schneider, Wolfgang Koch
  • Glass ceramic as filler in polymerizable dental filling compositions
    Patent number: 3973972
    Abstract: Transparent, colorless, particulate glass ceramic having a low coefficient of expansion, a high absorptivity for X-rays and which is useful in dental filling compositions, has the following ingredients, expressed as percent by weight of oxides: SiO.sub.2 40-55%, Al.sub.2 O.sub.3 15-25%, Li.sub.2 O 3-5%, P.sub.2 O.sub.5 3-10%, MgO 0-3%, ZnO 0-5%, ZrO.sub.2 2-7%, Ta.sub.2 O.sub.5 0-7% and La.sub.2 O.sub.3 >12-20%.
    Type: Grant
    Filed: September 11, 1974
    Date of Patent: August 10, 1976
    Assignee: Jenaer Glaswerk Schott & Gen.
    Inventor: Gerd Muller
  • Process for purifying a sulfur dioxide containing gas
    Patent number: 3974258
    Abstract: A sulfur dioxide containing gas is purified by successive contact with an ammonia solution and then a dilute ammonium sulfite solution; the latter solution is regenerated by electrodialysis while the ammonia solution, after SO.sub.2 absorption, is vaporized in order to recover ammonia and sulfur dioxide.
    Type: Grant
    Filed: June 20, 1974
    Date of Patent: August 10, 1976
    Assignee: Institut Francaise du Petrole, des Carburants et Lubrifiants et Entreprise de Recherches et d'Activities Petrolieres Elf
    Inventors: Jean-Pierre Poitevin, Claude Dezael
  • Catalyst for the preparation of polyalkenamers
    Patent number: 3974092
    Abstract: For the production of polyalkenamers there are provided catalysts consisting essentially of a catalyst system for the ring-opening polymerization of cyclic olefins consisting essentially of (1) a tungsten or molybdenum compound; (2) an organoaluminum compound; and (3) an ether of vinyl alcohol, of allyl alcohol, or of 2-butene-1,4-diol, the molar ratio of component (1) to component (2) being less than 1 : 1 and the molar ratio of component (1) to component (3) being less than 100 : 1. The catalyst system may also contain a compound containing one or more hydroxyl or sulfhydryl groups in a molar ratio to component (1) of about 0 : 1 to 2 : 1, respectively.
    Type: Grant
    Filed: January 7, 1974
    Date of Patent: August 10, 1976
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Roland Streck, Heinrich Weber
  • Process for the production of pure cyclopentene
    Patent number: 3974231
    Abstract: A process for the production of cyclopentene free of C.sub.5 -diene impurities, which comprises metathetically reacting cis-cis-cyclodecadiene-(1,6) with a catalytic amount of a metathesis catalyst at a reaction temperature of from 0.degree.C up to the temperature at which said catalyst decomposes for a period of time sufficient to form said cyclopentene.
    Type: Grant
    Filed: April 30, 1974
    Date of Patent: August 10, 1976
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Friedrich-Wilhelm Kuepper, Roland Streck
  • Catalyst system for the production of polyalkenamers
    Patent number: 3974094
    Abstract: Polyalkenamers are produced by a ring-opening polymerization of cyclic olefins employing a catalyst system comprising (1) a tungsten or molybdenum compound; (2) an organoaluminum compound; (3) a vinylic chloride, bromide or iodide; and, optionally, (4) a compound containing a hydroxyl or sulfhydryl group; and conducting the polymerization in the presence of an ethylenically unsaturated halogenated hydrocarbon wherein one of the double bonded carbon atoms is substituted by chlorine, bromine or iodine or halogenated alkyl or aryl and at least one hydrogen atom.
    Type: Grant
    Filed: November 13, 1974
    Date of Patent: August 10, 1976
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Roland Streck, Heinrich Weber
  • Process for removing sulfur dioxide contained in a gas
    Patent number: 3974257
    Abstract: A SO.sub.2 containing gas, for example a stack gas, is purified according to a multi-step process, which comprises washing said gas with an aqueous ammonia solution, treating the resulting solution with hydrochloric acid, whereby SO.sub.2 and an aqueous ammonium chloride solution are obtained and separated. The ammonium chloride solution is then reacted with magnesium oxide to recovery ammonia and the resulting magnesium chloride is cracked to produce hydrochloric acid and magnesium oxide, the ammonia, hydrochloric acid and magnesium oxide being recycled to the process.
    Type: Grant
    Filed: October 22, 1974
    Date of Patent: August 10, 1976
    Assignee: Institut Francais du Petrole, des Carburants et Lubrifiants et Entreprise de Recherches et d'Activities Petrolieres Elf
    Inventors: Claude Dezael, Andre Deschamps, Henri Gruhier
  • Cyanocarboxylate polymers and their process of manufacture
    Patent number: 3972867
    Abstract: Cyanocarboxylate polymers and copolymers are prepared by reacting a polymer or copolymer of conjugated diolefin with a cyanocarboxylate compound of the formula: ##EQU1## where R and R' are hydrogen atoms or alkyl, cycloalkyl, aryl or acyl groups of 1-12 carbon atoms, or R is a COOR' group or halogen.The resulting polymers or copolymers are useful as finishing agents or additives for unsaturated elastomers.
    Type: Grant
    Filed: March 27, 1975
    Date of Patent: August 3, 1976
    Assignee: Institut Francais du Petrole, des Carburants et Lubrifiants et Entreprise de Recherches et d'Activities Petrolieres Elf
    Inventors: Francois Dawans, Denise Nicolas
  • Cascaded refrigeration cycles for liquefying low-boiling gaseous mixtures
    Patent number: 3970441
    Abstract: Process for the at least partial liquefaction of a low-boiling gaseous mixture, which is under pressure, wherein the gaseous mixture is precooled in heat exchange with a vaporizing refrigerant, purified during the course of the precooling step, and, after the precooling step, is subjected to a preliminary separation, characterized in that the at least partial liquefaction of the gaseous fraction obtained during the preliminary separation is carried out in heat exchange with a vaporizing multicomponent gas, the partial liquefaction of which takes place by precooling, and the completed liquefaction and subcooling of which takes place in one stage against itself.
    Type: Grant
    Filed: January 13, 1975
    Date of Patent: July 20, 1976
    Assignee: Linde Aktiengesellschaft
    Inventors: Volker Etzbach, Wolfgang Forg, Peter Grimm
  • Tool power system usable as substitute for vehicle propulsion
    Patent number: 3970154
    Abstract: The ditcher is provided with two engines. The first engine powers the hydraulic system which rotates the digging wheel. The second engine powers the hydraulic system which actuates the wheel lifting cylinders, the conveyor system and the track driving means. The two hydraulic systems are selectively interconnected so that, in the event that the second engine fails, the first engine can be used to actuate the wheel lifting cylinders and track driving means. As a result, the ditcher's wheel can be lifted to the travelling position and the tracks driven to move the ditcher off the pipe line right-of-way and enable it to return to a base camp for repairs.
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: July 20, 1976
    Assignee: Banister Pipelines, Ltd.
    Inventor: Fred Willie Bartels
  • Chemically stable optical glass
    Patent number: 3970466
    Abstract: Optical glass, nd = 1.650 .+-. 2 .times. 10.sup..sup.-3 and vd = 55.5 .+-. 1.0, having a high chemical stability and a sufficiently low tendency toward crystallization that it can be manufactured in a continuous tank melting process into gobs, pressed components, and other formed articles as a mass-produced glass, said glass consisting essentially of, in percent by weight:SiO.sub.2 33.0 .+-. 0.5 B.sub.2 O.sub.3 11.6 .+-. 0.5 BaO 36.6 .+-. 1.0 La.sub.2 O.sub.3 14.0 .+-. 2.5 ZrO.sub.2 4.0 .+-. 2.5 As.sub.2 O.sub.3 0 - 0.5. or Sb.sub.2 O.sub.
    Type: Grant
    Filed: July 18, 1975
    Date of Patent: July 20, 1976
    Assignee: Jenaer Glaswerk Schott & Gen.
    Inventor: Marga Faulstich
  • 2,4-Quinazoline dione-polyamide-ester resins
    Patent number: 3970630
    Abstract: New polyamide-ester resins, their manufacture and the new compositions manufactured therefrom, the latter being useful for enameling metal conductors. The enameled conductors are stable at relatively high temperatures.The resins are manufactured from a polycarboxylic component, a part of which is a 2,4-quinazoline dione dicarboxylic compound, a polyamine component and a polyhydroxy component.
    Type: Grant
    Filed: March 18, 1974
    Date of Patent: July 20, 1976
    Assignee: Institut Francais du Petrole, es Carburants et Lubrifiants et Entreprise de Recherches et d'Activities Petroliers Elf
    Inventors: Choua Cohen, Durif Durif Varambon, Robert Salle, Bernard Sillion
  • Process for the preparation of prostaglandin F.sub.2.sub..alpha. and the analogs thereof
    Patent number: 3970692
    Abstract: Prostaglandin F.sub.2.sub..alpha. and analogs thereof of the formula ##SPC1##Wherein one of R.sub.1 and R.sub.2 is hydroxy and the other is H or CH.sub.3, R.sub.3 is the remainder of the lower side chain and X is the remainder of the upper side chain thereof are produced in two steps from a 3-acyloxy mono ester of a lactone of the formula ##SPC2##Wherein R.sub.1, R.sub.2 and R.sub.3 have the values given below, by reacting the lactone with excess diisobutylaluminum hydride and reacting the thus-produced ketol, in the presence of strong anhydrous base, with a Wittig reagent of the formula Ph.sub.3 P=CH--X--COOH wherein Ph is a phenyl group and X has the values given above.
    Type: Grant
    Filed: May 23, 1974
    Date of Patent: July 20, 1976
    Assignee: Schering Aktiengesellschaft
    Inventors: Bernd Raduchel, Werner Skuballa, Helmut Vorbruggen
  • Method for contraception by the administration of sequential contraceptive preparations
    Patent number: 3969502
    Abstract: Method of contraception over a 21-day cycle in which an estrogen and a progestogen are administered in a low dosage for 10-12 days and thereafter at a slightly higher dosage for the next 11-9 days.
    Type: Grant
    Filed: July 9, 1974
    Date of Patent: July 13, 1976
    Assignee: Schering Aktiengesellschaft
    Inventor: Ursula Lachnit-Fixson
  • Hydroxy phenylbutazone derivatives and their preparation
    Patent number: 3968219
    Abstract: Bis-hydroxyphenylbutazone esters of alkanedioic acids of the formula ##SPC1##Wherein n is an integer from 1 to 18, inclusive; R.sub.1 is hydrocarbon of 3-9 carbon atoms, optionally substituted by oxo or interrupted by thia, sulfinyl, or sulfonyl; and R.sub.2 is a hydrogen atom, a fluorine atom, a chlorine atom, lower alkyl of 1-4 carbon atoms, or trifluoromethyl, preferably in the ortho or para position, possess topical anti-inflammatory activity.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: July 6, 1976
    Assignee: Schering Aktiengesellschaft
    Inventors: Dieter Rahtz, Henning Koch, Erich Gerhards
  • Polyamine compositions useful as hardening agents for epoxy resins
    Patent number: 3968085
    Abstract: The invention concerns new aromatic polyamine compositions useful as hardening agents containing a major proportion of polyamines of the formula: ##EQU1## IN WHICH Ar and Ar' are divalent aromatic radicals having from 1 to 6 rings, R.sub.1 is a divalent hydrocarbon radical or a radical (R.sub.4 -O).sub.m R.sub.4, R.sub.4 being an alkylene and m an integer from 1 to 100.
    Type: Grant
    Filed: August 29, 1974
    Date of Patent: July 6, 1976
    Assignee: Institut Francais du Petrole, des Carburants et Lubrifiants
    Inventors: Guy Rabilloud, Bernard Sillion