Patents by Inventor Siegfried Lang

Siegfried Lang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6627088
    Abstract: Shaped articles which are suitable as biocidal depth-type filters and consist of fibrous materials and particles, embedded therein, of crosslinked crospovidone-iodine or crospovidone-hydrogen peroxide.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: September 30, 2003
    Assignees: BASF Aktiengesellschaft, Schenk Filterbau GmbH
    Inventors: Jörg Breitenbach, Bernhard Fussnegger, Siegfried Lang, Dietmar Oechsle
  • Patent number: 6592768
    Abstract: The invention provided relates to the use of polyvinylpyrrolidone-iodine complexes in combination with gelling agents to produce strong disinfectants which not only physically stabilize biohazardous and infectious wastes but also kill pathogens contained in the wastes. The gelling agents include polyacyrlates that are superabsorbents.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: July 15, 2003
    Assignee: BASF Corporation
    Inventors: Anthony Lepore, Siegfried Lang
  • Patent number: 6497886
    Abstract: The present invention relates to a 1,3-bis-(N-lactamyl)propane of general formula (I), wherein radicals R1, R2, R3, R4, R5 and R6 independently stand for hydrogen, alkyl, cycloalkyl, aryl or aralkyl and at least one of said radicals does not stand for hydrogen, (NLac) and (NLac′) are the same or different and stand for N-lactamyl radicals. The invention also relates to the use of said substances as a solvent in pharmaceutical and cosmetic agents. Disclosed are novel compounds of formula (I), wherein R1 and methyl and R2-R6 stand for hydrogen.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: December 24, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Jörg Breitenbach, Siegfried Lang, Detlef Kratz
  • Patent number: 6231848
    Abstract: The present invention relates to topical products intended for use as prophylactic or curative agents for bacterial skin infections, containing at least one polymeric complex substantially consisting of hydrogen peroxide, a suitable polymer for the complex formation thereof, possibly another bactericidal compound and possibly a metal salt or a metal colloid.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: May 15, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Jörg Breitenbach, Bernhard Fussnegger, Siegfried Lang
  • Patent number: 6203484
    Abstract: The invention provided relates to the use of polyvinylpyrrolidone-iodine complexes in combination with gelling agents to produce strong disinfectants which not only physically stabilize biohazardous and infectious wastes but also kill pathogens contained in the wastes. The gelling agents include polyacyrlates that are superabsorbents.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: March 20, 2001
    Assignee: BASF Corporation
    Inventors: Anthony Lepore, Siegfried Lang
  • Patent number: 6171583
    Abstract: Complexes in powder form of iodine and a crosslinked polymer based on N-vinyl compounds are obtainable by dry heating of iodine and a polymer which is obtained by polymerization of monovinyl compounds (monomers A) whose vinyl group is bonded to a nitrogen atom of a nitrogen-containing heterocycle, in the presence of from 0.5 to 10% by weight, based on the monomers (A), of a compound (B) of the formula I; where A is —CH— or a nitrogen atom, and n is 2 or 3. The complexes are suitable for producing antidiarrheals.
    Type: Grant
    Filed: May 7, 1998
    Date of Patent: January 9, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Jörg Breitenbach, Axel Sanner, Walter Denzinger, Siegfried Lang
  • Patent number: 6126843
    Abstract: A process for treating cooling lubricants to prevent attack by microorganisms using crospovidone-iodine as biocidal substance, wherein the cooling lubricant to be treated is brought into contact with a filter cake which consists essentially of particulate crospovidone-iodine as filter medium.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: October 3, 2000
    Assignees: BASF Aktiengesellschaft, Schenk Filterbau GmbH
    Inventors: Siegfried Lang, Bernhard Fussnegger, Dietmar Oechsle, Klaus Helmut Feifel, Martin Zeiler
  • Patent number: 6096911
    Abstract: A process for purifying alkoxylated fats by treatment with a solid substance, wherein a mixture of aluminum oxide and a silicate is employed as solid substance.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: August 1, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Gabriele Dralle-Voss, Michael Stosser, Siegfried Lang, Thomas Saupe, Matthias Zipplies
  • Patent number: 6083408
    Abstract: Shaped articles which are suitable as biocidal depth-type filters and consist of fibrous materials and particles, embedded therein, of crosslinked crospovidone-iodine or crospovidone-hydrogen peroxide.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: July 4, 2000
    Assignee: BASF Aktiengesellschaft and Schenk Filterbau GmbH
    Inventors: Jorg Breitenbach, Bernhard Fussnegger, Siegfried Lang, Dietmar Oechsle
  • Patent number: 5945032
    Abstract: Polymer complexes which comprises hydrogen peroxide, a polymer suitable for complex formation with hydrogen peroxide, and at least one metal colloid and/or metal salt are prepared as described and used in bactericidal compositions, disinfectant systems, hair cosmetic compositions and as free-radical initiators for chemical reactions.
    Type: Grant
    Filed: September 23, 1997
    Date of Patent: August 31, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Jorg Breitenbach, Bernhard Fussnegger, Siegfried Lang, Hans-Bernd Reich
  • Patent number: 5880252
    Abstract: Pyrrolidonyl-containing polyesters and polyamides I to III ##STR1## where R, X, A and Z are defined herein, are suitable as film formers and conditioners in hair-cosmetic formulations, for stabilizing hydrogen-peroxide in aqueous solution, for complexing iodine, as tablet binders and as a constituent of film coatings in pharmaceutical preparations, for enzyme and bleach stabilization in detergent formulations, as an auxiliary in the production and finishing of textiles, as a solubilizer and protective colloid in the preparation and stabilization of polymer dispersions, and as an adhesive raw material.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: March 9, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Son Nguyen Kim, Jorg Breitenbach, Axel Sanner, Peter Hossel, Siegfried Lang
  • Patent number: 5840769
    Abstract: Direct tabletting aidsA) 75-98% by weight of a powdered cellulose suitable for tablettingB) 1-15% by weight of soluble polyvinylpyrrolidoneC) 0.5-10% by weight of crosslinked insoluble polyvinylpyrrolidone.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: November 24, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl Kolter, Siegfried Lang, Peter Schmidt, Anja Huhne
  • Patent number: 5190791
    Abstract: A process brings out a high contrast in natural grain of a naturally pale wood via infrared irradiation having a wavelength which is as long as possible. This infrared radiation can come from a conventional infrared emitter or, more preferably, from a carbon dioxide laser. Due to the contact-free heating near the surface which is effective in a stagnant ambient atmosphere, the new wood part of the grain is browned, while the harder old wood part remains essentially unbrowned. This causes the natural grain of the wood to stand out in contrast. Due to the contact-free and turbulence-free mode of operation of the heating, the grain pattern produced is uniform. Any scratches or chatter marks in the wood are simply covered over and remain invisible.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: March 2, 1993
    Assignee: Mercedes-Benz AG
    Inventors: Jurgen Gunter, Siegfried Kohler, Siegfried Lang, Luise Schellhorn, Erwin Lutz
  • Patent number: 5006345
    Abstract: Direct tableting auxiliaries essentially consists of(A) from 88 to 96% by weight of pulverulent carrier conventionally used for the preparation of tablets and consisting of lactose, or lactose together with not more than the same amount of another carrier,(B) from 2 to 6% by weight of polyvinylpyrrolidone having a K value of from 20 to 40, and(C) from 2 to 10% by weight of crosslinked, insoluble polyvinylpyrrolidone, all percentages being based on the direct tableting auxiliary, and are obtained by spray drying, spray granulation or wet granulation.The novel direct tableting auxiliaries exhibit good flow and good compressibility under low pressure, and the tablets produced using the said auxiliaries possess excellent disintegration properties coupled with great hardness and low abrasion.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: April 9, 1991
    Assignee: BASF Aktiengesellschaft
    Inventor: Siegfried Lang
  • Patent number: 4801460
    Abstract: Process for the preparation of solid pharmaceutical forms by mixing one or more pharmaceutical active compounds with one or more fusible, pharmacologically tolerated binders and, if required, other conventional pharmaceutical auxiliaries, at from 50.degree. to 180.degree. C., and subjecting the mixture to injection molding or extrusion and shaping, wherein the fusible binder used is a NVP polymer which contains not less than 20% by weight of NVP as copolymerized units, and, where they are present, all of whose comonomers contain nitrogen and/or oxygen.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: January 31, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Helmut Goertz, Roger G. Klimesch, Klaus Laemmerhirt, Siegfried Lang, Axel Sanner, Reinhard Spengler
  • Patent number: 4786699
    Abstract: Polyvinylpyrrolidone having a Fikentscher K value of from 14 to 95 is prepared at from 50.degree. to 95.degree. C. in aqueous solution with hydrogen peroxide as starter, the solution being maintained at pH 7-11 by means of NaOH, KOH, their carbonates or bicarbonates.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: November 22, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Adolf Nuber, Siegfried Lang, Axel Sanner, Gerd Schroeder
  • Patent number: 4551512
    Abstract: Readily water-soluble, slightly hygroscopic terpolymers which consist of(a) from 10 to 40% by weight of vinylpyrrolidone,(b) from 20 to 50% by weight of vinyl acetate (VAc) or vinyl propionate and(c) from 10 to 40% by weight of hydroxyethyl acrylate, hydroxypropyl acrylate or hydroxyethyl methacrylate, which terpolymers are used as auxiliaries in the cosmetics and pharmaceuticals sectors.
    Type: Grant
    Filed: April 6, 1984
    Date of Patent: November 5, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Ferdinand Straub, Axel Sanner, Karl Seib, Siegfried Lang
  • Patent number: 4366151
    Abstract: Reaction of monohydroxy-fatty acids of the formulaCH.sub.3 --(CH.sub.2).sub.m --CHOH--(CH.sub.2).sub.n --COOHwhere m is an integer from 4 to 9 and n is an integer from 6 to 11, with from 12 to 20 moles of ethylene oxide, the products thus obtained, and their use as solubilizers.
    Type: Grant
    Filed: August 12, 1981
    Date of Patent: December 28, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Knut Oppenlaender, Heinz Krapf, Siegfried Lang
  • Patent number: 4350791
    Abstract: Polymers which due to their physiological compatibility may be used in plasma substitutes and which essentially contain vinylpyrrolidone and .alpha.,.omega.-diisocyanato-alkanecarboxylic acid esters as structural units, their preparation, and plasma substitutes containing such polymers.
    Type: Grant
    Filed: December 31, 1980
    Date of Patent: September 21, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Ferdinand Straub, Siegfried Lang, Eckhard Roske
  • Patent number: 4254239
    Abstract: High molecular weight products based on N-vinylpyrrolidone, in which blocks of vinylpyrrolidone polymers or vinylpyrrolidone copolymers are linked by connecting units carrying ester, amide, urethane or urea groups, as a result of which these high molecular weight products are biodegradable and may be used as plasma substitutes, and the plasma substitutes thus obtained.
    Type: Grant
    Filed: December 28, 1978
    Date of Patent: March 3, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Ferdinand Straub, Hans-Uwe Schenck, Siegfried Lang, Egon Brode