Patents Represented by Law Firm Keil, Thompson & Shurtleff
  • Aromatic polyether-sulfones
    Patent number: 4065437
    Abstract: New thermoplastic polymers based on aromatic polyether-sulfones, which have molecular weights of from about 15,000 to 35,000 and contain units of the formula ##STR1## and a process for their manufacture.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: December 27, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerd Blinne, Claus Cordes
  • 1,3-Didesoxy-1,3-[N,N'-(1',2',3',4'-tetrahydro-1',4'-dio xo)-phthalazino]-inositol compounds
    Patent number: 4065454
    Abstract: The reaction product obtained from cis-benzenetrioxide, hydrazine and phthalic anhydride, and its manufacture. The compounds are intermediates for stereospecific syntheses of aminocyclitols.
    Type: Grant
    Filed: July 26, 1976
    Date of Patent: December 27, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Horst Koenig, Horst Prinzbach, Reinhard Schwesinger
  • Process for the admixture of additives into plastics with simultaneous removal of volatile constituents
    Patent number: 4065532
    Abstract: A process for admixing additives to plastics and simultaneously removing volatile constituents in a horizontal devolatilizing extruder. Taken in sequence in the direction of flow, the additives are first introduced into the devolatilizing extruder from above, and the plastic melt, solution or dispersion is then introduced from below, while the bulk of the volatile constituents are withdrawn from the devolatilizing extruder at an orifice located vertically above the point at which the plastic is fed in. The process permits the removal of volatile constituents with simultaneous admixture of additives during aftertreatment of plastics, in a single step and at very high throughputs.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: December 27, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Wild, Guenter Jeckel, Adolf Echte, Johann Zizlsperger, Rudi Wilhelm Reffert, Gunter Thielen
  • Polybutylene terephthalate molding compositions which are resistant to heat-aging
    Patent number: 4064103
    Abstract: Stabilized polyester molding compositions in which the stabilizer is a carbodiimide of the formula ##STR1## where R is hydrogen, alkyl, halogen or nitro, at least one of the substituents R in the ortho-position to the carbodiimide group must differ from hydrogen, and the carbodiimide molecule contains, as substituents R, 2 alkyl groups and 2 nitro groups, or from 4 to 6 chlorine atoms, or 2 alkyl groups and from 4 to 6 chlorine atoms, or 2 chlorine atoms and 2 nitro groups, or 4 chlorine atoms and 2 bromine atoms.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: December 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Claus Cordes, Hans-Josef Sterzel
  • Transfer printing of cellulosic fabrics and transfer for use therein
    Patent number: 4063879
    Abstract: A process for the transfer printing of fabrics containing or consisting of cellulose fibers, by using transfers, wherein the fabric is impregnated with aqueous solutions of compounds which are both solvents for the transfer dyes and potential crosslinking agents for cellulose, dried and printed by the transfer process, in the presence of a cross-linking catalyst, applied from a transfer, with sublimable dyes or optical brighteners.
    Type: Grant
    Filed: January 16, 1976
    Date of Patent: December 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Faulhaber, Hugo Fuetterer, Harro Petersen, Hermann Schwab
  • Manufacture of easily dispersed transparent iron oxide pigments
    Patent number: 4063957
    Abstract: A process for the manufacture of easily dispersed, transparent iron oxide pigments of high tinctorial strength, in which the pigment paste, moist with water, is homogenized under the action of shear forces in the presence of at least one monohydric aliphatic or cycloaliphatic alcohol of 4 to 12 carbon atoms which is partially soluble in water and can be vaporized without decomposition, and the kneaded mixture is then dried under gentle conditions. The pigments are easily dispersed in finishes or binder solutions for printing inks. Very pure and glossy colorations of optimum transparency are obtained.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: December 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Peter von Lauff, Wolfgang Fabian, Heidrun Hellstern
  • Expansion joint with elastomer seal
    Patent number: 4063839
    Abstract: An expansion joint with an elastomer seal having longitudinal frames made from aluminum extrusions extending longitudinally of an expansion joint for pavements and bridge decks. The longitudinal frames are mounted by anchor bolts in the pavement or bridge deck concrete, which pavement or bridge deck has a concrete or asphaltic wear surface. The elastomer seal is fixedly held in the longitudinal frames by elongated tongue and groove means, and the joint space is spanned by at least one shallow, V-shaped elastomer wall which deforms downwardly as the joint width becomes narrower. The longitudinal frames are held in position in steps in the concrete adjacent to the joint by the anchor bolts, which have threaded ends projecting upwardly into an upwardly facing longitudinal channel and the hollow space of a hollow segment of substantially square cross section in the respective longitudinal frames.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: December 20, 1977
    Assignee: The D. S. Brown Company
    Inventor: Delmont D. Brown
  • Process for the manufacture of shaped articles by graft polymerization
    Patent number: 4064198
    Abstract: Process for the manufacture of shaped articles of a mixture of polystyrene and a copolymer of ethylene with vinyl ester, acrylate or methacrylate. To this end, the said copolymers having a content of from 3 to 40% by weight of unsaturated ester are reacted with monomeric styrene in aqueous suspension in the presence of free-radical polymerization initiators. Whereas a portion of the styrene used is directly grafted onto the ethylene copolymer, the remainder of the polymerized styrene is present in a finely divided state as a homopolymer beside or within the grafted ethylene copolymer. There are obtained homogeneous shaped articles having a styrene content of more than 50% by weight.
    Type: Grant
    Filed: April 21, 1976
    Date of Patent: December 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Zeitler, Lothar Hoehr, Heinz Mueller-Tamm
  • Process for printing fibrous material
    Patent number: 4064309
    Abstract: A method of printing fibrous materials using a print paste incorporating as emulsifier a di-(.alpha.-phenylethyl)-phenol which has been first reacted with from 2 to 12 moles of propylene oxide and/or butylene oxide and then with from 14 to 30 moles of ethylene oxide.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: December 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Merger, Gerhard Nestler, Knut Oppenlaender, Guenter Uhl, Ruediger Wissler
  • Manufacture of cobalt-modified .gamma.-iron(III)oxides
    Patent number: 4064292
    Abstract: The invention relates to the manufacture of acicular cobalt-modified .gamma.-iron(III) oxide by coating an acicular .alpha.-iron(III) oxide or its hydrate with an inorganic protective coating, subsequent reduction to magnetite at 350.degree. to 650.degree. C, application of the cobalt compound to this magnetite or to the .gamma.-iron(III) oxide obtained therefrom by oxidation, and subsequent heat treatment at 80.degree. to 300.degree. C, if necessary with simultaneous oxidation of the magnetite to the corresponding .gamma.-iron(III) oxide. This iron oxide has high coercivity and can be used as the magnetic component in magnetic recording media for recording high frequencies without having the disadvantage of thermal and mechanical instability.
    Type: Grant
    Filed: February 10, 1976
    Date of Patent: December 20, 1977
    Assignee: Badische Anilin- & Soda-Fabrik, Aktiengesellschaft
    Inventors: Eduard Schoenafinger, Matthias Schwarzmann, Eberhard Koester
  • Apparatus for calibrating and surfacing tubes
    Patent number: 4063439
    Abstract: An improvement in a process and apparatus for internal finishing and calibrating tubes is provided in which the internal surface of the tube is sprayed during the work on the tube with at least one lubricating jet directed to the work zone ahead of the passage of the tool.
    Type: Grant
    Filed: September 22, 1975
    Date of Patent: December 20, 1977
    Assignee: Chabas & Besson S.A.
    Inventor: Louis A. Besson
  • Manufacture of pyrazines
    Patent number: 4064124
    Abstract: Pyrazines are manufactured by reaction of nitrooxiranes with ammonia. The products are starting materials for the manufacture of dyes, fungicides and pharmaceuticals.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: December 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Martin Weitz, Rolf Fischer
  • Removal of phosgene from off-gases
    Patent number: 4064218
    Abstract: Process for the removal of phosgene from an off-gas in which it is present in small quantities, by washing with an aqueous solution of alkali and ammonia.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: December 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Scholz, Martin Decker, Franz Neumayr
  • Halobenzoylpropionate and N,N-diethyl-m-toluamide as insect repellents
    Patent number: 4064268
    Abstract: Inspect repellents containing as active compound a composition of a halobenzoylpropionate and N,N-diethyl-m-toluamide.
    Type: Grant
    Filed: June 18, 1976
    Date of Patent: December 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Adolphi, Gerhard Bachmann
  • Butynediol manufacture
    Patent number: 4062899
    Abstract: Basic carbonate which contains copper and aluminum and is suitable for the manufacture of copper-containing catalysts and which has the general formula Cu.sub.m Al.sub.6 (CO.sub.3).sub.0.5m O.sub.3 (OH).sub.m+12, where m may be an integer or non-integer between 2 and 6.
    Type: Grant
    Filed: August 9, 1976
    Date of Patent: December 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Rudolf Laurer, Wolfgang Schroeder, Herwig Hoffmann, Heinz Lingk
  • Naphtholactam dyes
    Patent number: 4062845
    Abstract: Condensation products of derivatives of naphtholactam and barbituric acid useful as dyes for synthetic fibers, particularly synthetic linear polyesters, and for coloring resins. The dyes give brilliant yellow to violet shades having outstanding fastness properties.
    Type: Grant
    Filed: June 18, 1976
    Date of Patent: December 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventor: Ernst Schefczik
  • Partial dehydration of cyclohexanone oxime
    Patent number: 4061677
    Abstract: The application relates to a process for partial dehydration of cyclohexanone oxime by treatment with an aqueous solution of an inorganic salt, the crude cyclohexanone oxime being extracted at above its melting point countercurrently in an extraction column with a concentrated solution of ammonium or/and hydroxylammonium salt. The salt solution may be used again after concentration. This may be effected by simple evaporation.
    Type: Grant
    Filed: June 28, 1976
    Date of Patent: December 6, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Kurt Kahr, Hanns Pohl, Guenther Rapp, Peter Lauz
  • Manufacture of gamma-iron(III) oxide
    Patent number: 4061725
    Abstract: Acicular gamma-iron(III) oxide is manufactured by reacting an iron(II) salt solution with an aqueous solution of an alkali metal hydroxide and oxidizing the resulting suspension of iron(II) hydroxide in three stages. In a first stage, at most from 0.1 to 4% by weight of the amount of iron(II) hydroxide originally present is oxidized in the course of from 0.1 to 4 hours, in a second stage from 10 to 25% by weight of the said original amount are oxidized in the course of from 1.5 to 6 hours and in a third stage the remaining amount is oxidized. After the oxidation, the goethite formed is reduced to magnetite and the latter is then oxidized to acicular gamma-iron(III) oxide.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: December 6, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Manfred Ohlinger, Eduard Schoenafinger, Walter Schneider, Heinz Stritzinger, Guenter Vaeth
  • Purifying acrylonitrile for the manufacture of acrylonitrile polymers
    Patent number: 4061858
    Abstract: Acrylonitrile or monomer mixtures containing acrylonitrile are purified by treating them with alkaline reacting compounds followed by distillation. The products are particularly suitable for the manufacture of acrylonitrile polymers showing improved color stability.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: December 6, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Wild, Rudolf Jung, Adolf Echte, Johann Zizlsperger, Hermann Gausepohl
  • Process for the recovery of gaseous or vaporous monomers from reaction off-gases
    Patent number: 4061849
    Abstract: Gaseous and/or vaporous monomers are recovered from reaction off-gases by treating the latter with compounds which are liquid at 50.degree. C and atmospheric pressure and with which, and/or in which, the said monomers are subsequently reacted.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: December 6, 1977
    Assignee: BASF Aktiengesellschaft
    Inventor: Alfred Muenster