Patents by Inventor Lothar Klein

Lothar Klein 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).

  • Modular unit, method and device for inserting same
    Patent number: 6113300
    Abstract: The invention relates to a modular unit consisting of two building components having joint surfaces arranged in pairs to be fastened with rivets. In order to ensure perfect meeting of the pairs of joint surfaces, there is a pair of bearing surfaces designed in such a way that, upon exerting a supporting force thereon, a force component is generated through the assembling joints.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: September 5, 2000
    Assignee: DaimlerChrysler AG
    Inventors: Lothar Klein, Hartmut Carstensen
  • Process for the preparation of beta-hydroxyalkypicolinium salts
    Patent number: 5840902
    Abstract: .beta.-Hydroxyalkylpicolinium salts of the formula (I) ##STR1## wherein A, R.sup.1 to R.sup.3 and X have the meanings given in the description, which are obtained by reaction of picolines of the formula (II) ##STR2## with alkylene oxides of the formula (III) in the presence of a 1- to 3-basic acid and in water or an organic solvent as the reaction medium and are used as intermediate products for the preparation of cationic dyestuffs, and dyestuff preparations comprising such cationic dyestuffs.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: November 24, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karlheinrich Meisel, Klaus Walz, Gerd-Friedrich Renner, Hans Schulze, Carsten Gerdes, Karl-Rudolf Gassen, Reiner Ditzer, Lothar Klein
  • Catalyst for the preparation of bisphenols
    Patent number: 4369293
    Abstract: A catalyst for the preparation of bisphenols from phenols and compounds containing carbonyl groups consisting of a styrene/divinyl benzene copolymer into which are introduced sulphochloride groups which, in turn, have been partly reacted with mercaptoalkylamine and partly hydrolyzed to form sulphonic acid groups.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: January 18, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Frieder Heydenreich, Claus Wulff, Lothar Klein, Hans-Jurgen Meissner, Norbert Bachem
  • Apparatus for self-instruction
    Patent number: 3986275
    Abstract: A series of cards, bearing as learning units as for programmed instruction respective frames of information, questions or problems and answers or solutions, are arranged in like orientation and in ordered sequence in a stacked pack for a preferred embodiment disposed in a stack-form-maintaining container. A perforation margin of each card has a hole corresponding to a correct answer response, or additionally for incorrect responses, a slot or slots coincident with an underlying card hole.
    Type: Grant
    Filed: May 28, 1975
    Date of Patent: October 19, 1976
    Inventor: Lothar Kleine-Horst