Patents by Inventor Peter Hanssle

Peter Hanssle 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).

  • Using a dicarboxylic acid dialkyl ester brightening
    Patent number: 6344108
    Abstract: A process for producing fibrous materials for the manufacture of cellulose, paper or wood materials by using at least one dicarboxylic acid dialkyl ester and/or a copolymer of polyester-polyether and/or fatty acid polyol monopolyester, dipolyester, tripolyester and or higher polyester. Fibrous materials with an improved quality and higher yield are thus produced.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: February 5, 2002
    Assignee: Stockhausen GmbH & Co. KG
    Inventors: Ingo Von Medvey, Thomas Rajcsanyi, Peter Hänssle, Joachim Werres
  • Isomerization of isolated double bonds to conjugated double bonds in optionally substituted cyclooctadienes
    Patent number: 4513157
    Abstract: In the isomerization of isolated double bonds to conjugated double bonds in optionally substituted cyclooctadienes, the isomerization catalyst comprises: (a) a transition metal compound of the formula Me(OR.sup.1).sub.4, wherein Me is Ti, Zr, or Hf, and R.sup.1 is C.sub.1-4 alkyl, and (b) an organoaluminum compound of the general formula AlR.sup.2.sub.3-n X.sub.n, wherein R.sup.2 is C.sub.1-4 alkyl, n is 0, 1, 2, or a fraction between 1 and 2, and X is halogen or, if n is 1, also hydrogen; the molar ratio of (a):(b) being in the range from 0.1 to 1:1, the catalyst having prolonged activity and the isomerization being conducted at a temperature of 50.degree.-200.degree. C.
    Type: Grant
    Filed: June 22, 1984
    Date of Patent: April 23, 1985
    Assignee: Chemische Werke Huels, AG
    Inventors: Peter Hanssle, Wolfgang Zaar
  • Process for the preparation of secondary and tertiary 2-carboxyethyl- and carboxymethylphosphines and their salts, as well as the use thereof
    Patent number: 4328163
    Abstract: A process for preparing a secondary or tertiary 2-carboxyethyl- or carboxymethylphosphine or a salt thereof comprisessaponifying the corresponding cyanoalkyl phosphine with an aqueous-alcoholic alkali metal hydroxide solution, to prepare the alkali metal salt of the corresponding phosphino carboxylic acid,treating an aqueous solution of the acid salt so produced with a strongly acidic ion exchanger, andneutralizing the resultant free acid with an alkali metal hydroxide, ammonia or an amine when a salt thereof is to be prepared.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: May 4, 1982
    Assignee: Chemische Werke Huels, A.G.
    Inventor: Peter Hanssle
  • Secondary and tertiary 2-carboxyethyl- and carboxymethylphosphines and the salts thereof, as well as their preparation and use
    Patent number: 4315867
    Abstract: Secondary and tertiary 2-carboxyethyl or carboxymethylphosphines or a salt thereof, of the formulaR--P(CH.sub.2 COOMe).sub.2 or R--P(CH.sub.2 --CH.sub.2 --COOMe).sub.2whereinMe is hydrogen, an alkali metal or NR'.sub.4 wherein R' is hydrogen, C.sub.1-10 alkyl or C.sub.6-14 aryl, andR is hydrogen or a saturated or unsaturated, aliphatic or cycloaliphatic group of 1-20 carbon atoms and, for the 2-carboxyethylphosphines, also C.sub.6-14 aryl,are useful as components in catalysts for ethylene oligomerization.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: February 16, 1982
    Assignee: Chemische Werke Huels, Aktiengesellschaft
    Inventor: Peter Hanssle