Patents by Inventor Peter Freyberg

Peter Freyberg 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: 5820636
    Abstract: A process for the continuous pretreatment of cellulosic textile material comprisesa) a precleaning step wherein the treatment bath used comprises customary surfactants and other customary auxiliaries with or without customary enzymes as desizing agents and has a pH of from 5 to 11, and, after washoff and rinse,b) a bleaching step with hydrogen peroxide in an alkaline-aqueous liquor which comprises customary surfactants and other customary auxiliaries,wherefor the treatment bath of (a) additionally comprises from 1 to 10% by weight, based on the weight of the textile material,(i) either of an aminopolycarboxylic acid, of a hydroxyalkyl- or amino-phosphonic acid, of a polycarboxylic acid, of a polyhydroxycarboxylic acid or of an inorganic polymetaphosphate, or a mixture thereof, as complexing agent for polyvalent metal ions, or(ii) of a water-soluble polymer derived from 40 to 100% by weight of monoethylenically unsaturated mono- or dicarboxylic acids or anhydrides, or a mixture thereof, and has a K value of fr
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: October 13, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz-Dieter Angstmann, Dieter Bassing, Peter Freyberg
  • Patent number: 5298635
    Abstract: Tertiary amides useful as low-foam wetting agents in the textile industry have the formula I ##STR1## where R.sup.1 is straight-chain or branched C.sub.5 -C.sub.17 -alkyl or -alkenyl,R.sup.2 is straight-chain or branched C.sub.3 -C.sub.6 -alkyl,R.sup.3, R.sup.4 and R.sup.5 are each independently of the others hydrogen, methyl or ethyl, andn is from 3 to 15.
    Type: Grant
    Filed: May 14, 1993
    Date of Patent: March 29, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Beckmann, Ralf Brueckmann, Johannes P. Dix, Peter Freyberg, Erich Kromm
  • Patent number: 4229174
    Abstract: A process for dyeing textile materials, containing natural and/or synthetic fibers, in an aqueous liquor by means of dyes which are sparingly soluble or insoluble in water, in the presence of dyeing assistants, wherein the dispersant used is a water-soluble sulfonic acid which is derived from a random copolymer of olefins of 3 to 6 carbon atoms and styrene and/or substituted styrenes and/or their alkali metal salts or ammonium salts.
    Type: Grant
    Filed: December 27, 1978
    Date of Patent: October 21, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Paul Boerzel, Peter Freyberg, Norbert Greif, Rudi Widder
  • Patent number: 4076497
    Abstract: Polyester fibers and cellulose fibers, and blends of these fibers, are dyed continuously with disperse dyes, or dispersed dyes, by continuous application of an aqueous dye liquor which contains, as the essential dyeing assistant, a polyoxyalkylated amine, a polyoxyalkylated amine-oxide and/or a quaternized polyoxyalkylated amine which in 1% strength aqueous solution has a cloud point of not less than 18.degree. C and which is derived from amines which contain at least 2 nitrogen atoms and at least one group which can be oxyalkylated, followed by drying and fixing.
    Type: Grant
    Filed: January 22, 1976
    Date of Patent: February 28, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Freyberg, Dieter Horn, Knut Oppenlaender, Hans Wolf, Dieter Distler
  • Patent number: 3962172
    Abstract: Glass fiber reinforced polyamide molding material of high impact strength which contains:A. from 40 to 90 parts by weight of a polyamide; andB. from 10 to 60 parts by weight of glass fibers coated with a film-forming polymer containing from 4 to 50% by weight of units of the general formula: ##EQU1## in which R.sup.1 is hydrogen or alkyl of one to five carbon atoms and R.sup.2 is a saturated divalent hydrocarbon radical of two to ten carbon atoms; with or withoutC. a conventional stabilizer, flame retardant, pigment, filler or other additive.
    Type: Grant
    Filed: September 3, 1974
    Date of Patent: June 8, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Wurmb, Peter Freyberg, Kurt Wendel, Wolfgang Schwarz