Patents by Inventor Frank Jaekel

Frank Jaekel 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).

  • Process for the preparation of purified phthalimidoalkanecarboxylic acids
    Patent number: 5470988
    Abstract: Process for the preparation of purified phthalimidoalkanecarboxylic acidsThe present invention relates to a process for the preparation of purified phthalimidoalkanecarboxylic acids which are contaminated with phthalic acid, lactam and/or water, including the following measures:a) fusing the contaminated phthalimidoalkanecarboxylic acid,b) holding the melt for a period and at a temperature sufficient for the impurities to have substantially departed from the melt andc) cooling the purified product melt.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: November 28, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Frank Jaekel
  • Imidocarboxylic acid activators and sulfimidocarboxylic acid activators, processes for their preparation and their use
    Patent number: 5438147
    Abstract: A persalt activator or salt thereof which is derived from an imidocarboyxlic acid or sulimidocarboxylic acid of the formula I: ##STR1## in which A is a group of the formula ##STR2## n is the number 0, 1 or 2, R.sup.1 is hydrogen, chlorine, bromine, C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, aryl, or alkylaryl,R.sup.2 is hydrogen, chlorine, bromine or a group of the formula --SO.sub.3 M, --CO.sub.2 M or --OSO.sub.3 M,X is C.sub.1 -C.sub.19 -alkylene or arylene,B is a group of the formula C.dbd.O or SO.sub.2, andL is a leaving group.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: August 1, 1995
    Assignee: Hoechst AG
    Inventors: Frank Jaekel, Gerd Reinhardt, Wolf-Dieter Meller
  • Stable granules for detergents, cleaning agents and disinfectants
    Patent number: 5419846
    Abstract: The present invention relates to stable granules comprising active substance, granulating auxiliary, enveloping substance and if appropriate additional components, wherein the enveloping substance in each case comprisesa) silicon dioxide particles orb) homopolymers of unsaturated sulfonic acids orc) copolymers of unsaturated sulfonic acids and unsaturated carboxylic acids ord) homopolymers of (meth)acrylic acid esters ore) copolymers of (meth)acrylic acid esters and unsaturated carboxylic acids orf) mixtures of one or more of these constituents.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: May 30, 1995
    Assignee: Hoechst AG
    Inventors: Frank Jaekel, Gerd Reinhardt, Gerhard Noltner, Eric Jacquinot, Rudiger Funk, Manfred Muller
  • Process for the preparation of ureidoperoxycarboxylic acids
    Patent number: 5235099
    Abstract: A process for the preparation of ureidoperoxycarboxylic acids of the formula ##STR1## in which x is the number 1 or 2,A,if x is 1,is hydrogen, C.sub.1 -C.sub.20 -alkyl, aryl, preferably phenyl, or haloaryl, preferably chlorophenyl, orif x is 2,is C.sub.1 -C.sub.20 -alkylene or arylene, preferably phenylene,B is a group of the formula ##STR2## in which n is a number from 1 to 20,m is the number 0, 1 or 2,R.sup.1 is C.sub.1 -C.sub.20 -alkyl andR.sup.2 is in each case hydrogen or C.sub.1 -C.sub.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: August 10, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolf-Dieter Muller, Frank Jaekel, Peter Naumann, Gerd Reinhardt
  • Sulfimidoperoxycarboxylic acids
    Patent number: 5153189
    Abstract: Sulfimidoperoxycarboxylic acids of the formula ##STR1## in which A is a group of the formula ##STR2## n is the number 0, 1 or 2, R.sup.1 is hydrogen, fluorine, chlorine, bromine, C.sub.1 -C.sub.20 - alkyl, C.sub.2 -C.sub.20 -alkenyl, aryl or C.sub.1 -C.sub.10 -alkylaryl,R.sup.2 is hydrogen, fluorine, chlorine, bromine or a group of the formula SO.sub.3 M, CO.sub.2 M or OSO.sub.3 M,M is hydrogen, an alkali metal or ammonium ion or the stoichiometric amount of an alkaline earth metal ion andX is C.sub.1 -C.sub.19 -alkylene or ortho-, meta- or para-arylene.These sulfimidoperoxycarboxylic acids are suitable as bleaches, oxidants or disinfectants.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: October 6, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Walter Rupp, Hanspeter Gethoffer, Gerd Reinhardt, Frank Jaekel