Patents by Inventor Albrecht Marhold

Albrecht Marhold 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).

  • Thermoplastic fluorocopolymers and the fluoromonomers used for their preparation
    Patent number: 5426165
    Abstract: The present invention relates to fluoropolymers with improved temperature resistance and dimensional stability in the heat based on fluoroethylenes, using perfluoro-(cycloalkyl-vinyl ethers) and optionally other monomers as comonomers. The invention also relates to the perfluor-(cycloalkyl-vinyl ethers) which impart the advantageous thermal properties to the fluoropolymers according to the invention.
    Type: Grant
    Filed: May 12, 1994
    Date of Patent: June 20, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Kruger, Karl-Erwin Piejko, Michael Negele, Ulrich Eisele, Albrecht Marhold
  • Process for the preparation of halogenated aromatic compounds
    Patent number: 5420364
    Abstract: Halogenated aromatic compounds are prepared by passing esters of halogenoformic acid at temperatures in the range 150.degree. to 600.degree. C. and pressures from 0.1 to 3 bar over a catalyst containing chromium, magnesium, iron, silicon and/or aluminium, wherein if Al.sub.2 O.sub.3 catalysts are used these have been activated with hydrogen halide.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: May 30, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Norbert Lui, Albrecht Marhold
  • 2,2-difluorobenzo (1,3)-dioxole-carbaldehydes and new intermediate products
    Patent number: 5420308
    Abstract: According to the invention, a new process has been found for the preparation of 2,2-difluoro-benzo[1,3]-dioxole-carbaldehydes of the formula (I) ##STR1## in which benzo[1,3]dioxole-carbaldehydes are chlorinated, the 2,2-dichloro-dichloromethylbenzo[1,3]dioxoles formed, which are likewise new, are partly fluorinated to give the 2,2-difluoro-dichloromethyl-benzo[1,3]dioxoles, which are likewise new, and these are then reacted with urotropin to give the desired compounds.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: May 30, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Andres, Albrecht Marhold
  • Fluorinated 1,3-benzo- and 1,3-pyrido-dioxoles, their preparation and their use
    Patent number: 5420309
    Abstract: Novel fluorinated 1,3-benzo- and 1,3-pyrido-dioxoles of formula (I): ##STR1## in which A is C-R.sup.4 or N,X is hydrogen, fluorine, chlorine or bromine andR.sup.1 to R.sup.4 can be identical to or different from one another and are each hydrogen, halogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, halogeno-C.sub.1 -C.sub.6 -alkyl, C.sub.6 -C.sub.10 -aryl, CHO, COOH, COCl, CN, OH, NCO, COO--C.sub.1 -C.sub.6 -alkyl, NO.sub.2, NH.sub.2, NH--C.sub.1 -C.sub.6 -alkyl, N(C.sub.1 -C.sub.6 -alkyl).sub.2, SO.sub.2 Cl, SO.sub.3 H, SO.sub.3 Na or SO.sub.3 K,it also being possible for two adjacent radicals from the series R.sup.1 to R.sup.4 together to be an optionally substituted --CH.dbd.CH--CH.dbd.CH-- bridge, processes for their preparation and their use for the preparation of plant protection agents.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: May 30, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stefan Bohm, Albrecht Marhold
  • Furazanylureas
    Patent number: 5405858
    Abstract: The invention relates to the new furazanylureas of the general formula (I) ##STR1## in which R.sup.1 represents hydrogen or fluorine,R.sup.2 represents hydrogen, fluorine or chlorine,R.sup.3 represents hydrogen, fluorine or chlorine andR.sup.4 represents phenyl which is substituted by trifluoromethyl and additionally monosubstituted to tetrasubstituted by fluorine and/or chlorine, and,in the event that R.sup.1 represents fluorine and/or R.sup.2 and/or R.sup.3 represent fluorine or chlorine, R.sup.4 furthermore also represents difluoromethyl, trifluoromethyl, chlorodifluoromethyl, trifluoroethyl, tetrafluoroethyl, chlorotrifluoroethyl, hexafluoropropyl, hexafluoropropenyl or trifluoromethylphenyl,which can be used as pesticides.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: April 11, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wilhelm Sirrenberg, Reinhard Lantzsch, Albrecht Marhold, Ulrike Wachendorff-Neumann, Alfred Elbert
  • Copolymerizable fluorinated compounds, a process for their preparation and thermoplastic fluoropolymers obtainable therefrom
    Patent number: 5399645
    Abstract: A 2-allyl-perfluoroalkyl-trifluorovinyl ether of the formula ##STR1## wherein R.sup.1.sub.F and R.sup.2.sub.F represent either --CF.sub.3 or, together, (CF.sub.2).sub.n where n=2 or 3,is produced bya) reacting hexafluoropropene oxide with a 2-allyl-substituted perfluorocycloketone or perfluoroketone,b) subjecting the resulting 2-(allylperfluorocycloalkoxy)- or 2-(allylperfluyoro-alkoxy)-perfluoropropanoic acid fluoride to alkaline saponification thereby to form the corresponding sodium salt,c) and decarboxylating the sodium salt at about 150.degree.-350.degree. C.Polymers thereof produce amorphous, transparent coatings or molded items with glass transition temperatures between 60.degree. and 150.degree. C. and have good solubility characteristics in a number of organic solvents.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: March 21, 1995
    Assignee: BAYER Aktiengesellschaft
    Inventors: Ralf Kruger, Michael Negele, Albrecht Marhold
  • Process for the preparation of .alpha.-fluoro-.beta.-dicarbonyl compounds
    Patent number: 5391811
    Abstract: .alpha.-fluoro-.beta.-dicarbonyl compounds are prepared by reacting a halogenated dicarbonyl compound at temperatures of 20.degree. to 100.degree. C. with an addition product of hydrogen fluoride and a trialkylamine. This process is easy to carry out in technical terms and can also be carried out on a large scale.
    Type: Grant
    Filed: November 3, 1993
    Date of Patent: February 21, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stefan Bohm, Albrecht Marhold
  • Substituted triazolinones
    Patent number: 5378681
    Abstract: The invention relates to new substituted triazolinones of the general formula (I) ##STR1## in which R.sup.1 represents hydrogen, alkyl, alkoxy, halogenoalkyl or halogenoalkoxy,R.sup.2 represents hydrogen, alkyl or halogenoalkyl,R.sup.3 represents hydrogen or halogen,R.sup.4 represents hydrogen, cyano, halogen or a radical of the formula --O--R.sup.6, --S--R.sup.6, --C(O)--O--R.sup.6, --C(O)--S--R.sup.6, --NR.sup.6 R.sup.7 or --C(O)--NR.sup.6 R.sup.7,R.sup.5 represents cyano or nitro andX represents oxygen or sulphur, whereR.sup.6 and R.sup.7 independently of one another in each case represent hydrogen or in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, cycloalkoxycarbonyl, aryl or arylalkyl,to a plurality of processes for their preparation, and to their use as herbicides.
    Type: Grant
    Filed: November 16, 1993
    Date of Patent: January 3, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Schallner, Wilhelm Haas, Karl-Heinz Linker, Kurt Findeisen, Klaus Konig, Albrecht Marhold, Hans-Joachim Santel, Robert R. Schmidt
  • Pesticidal substituted 2-arylpyrroles
    Patent number: 5378724
    Abstract: Pesticidal substituted 2-arylpyrroles of the formula ##STR1## in which n represents 0, 1 or 2,Ar represents optionally substituted aryl,R.sup.1 and R.sup.2 independently of one another represent hydrogen or halogen, but at least one of the two radicals R.sup.1 or R.sup.2 represents halogen,R.sup.3 represents hydrogen, halogen or optionally substituted alkyl,X.sup.1 and X.sup.2 independently represent hydrogen or halogen andR.sup.4 represents hydrogen or ##STR2## (R.sup.5 and R.sup.6 having various meanings). The compounds of the formulas ##STR3## are also new.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: January 3, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hermann Uhr, Albrecht Marhold, Stefan Bohm, Christoph Erdelen, Ulrike Wachendorff-Neumann, Wilhelm Stendel
  • Process for preparing 1-fluorocyclopropyl methyl ketone
    Patent number: 5371295
    Abstract: A new process for the preparation of 1-fluorocyclopropyl methyl ketone of the formula ##STR1## which process comprises a) in a first step, reacting 2-acetyl-2-chloro-4-butanolide of the formula ##STR2## with an addition product of triethylamine and hydrogen fluoride of the formula(C.sub.2 H.sub.5).sub.3 N.n HFin whichn represents the numbers 1, 2 or 3, in the presence of a diluent at a temperature between 20.degree. C. and 120.degree. C. andb) in a second step, reacting the resulting 2-acetyl-2-fluoro-4-butanolide of the formula ##STR3## with a nucleophilic agent in the presence of a diluent at a temperature between 50.degree. C. and 200.degree. C.New halogenoketones of the formula ##STR4## in which Hal represents chlorine or bromine.
    Type: Grant
    Filed: March 30, 1994
    Date of Patent: December 6, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stefan Bohm, Albrecht Marhold
  • Pesticidal substituted aminophenyl carbamates
    Patent number: 5371271
    Abstract: Fungicidal substituted aminophenyl carbamates of the formula ##STR1## in which X represents --CO--NR.sup.8 R.sup.9 ; --CO--OR.sup.9 ; --CO--SR.sup.9 ; --CO--R.sup.10 ; --SO.sub.2 R.sup.9 or hydrogen, in whichR.sup.8 represents hydrogen or alkyl,R.sup.9 represents optionally substituted aryl, optionally substituted aralkyl, optionally substituted alkyl, alkenyl, halogenoalkenyl, or in each case optionally substituted cycloalkyl, cycloalkenyl or cycloalkylalkyl, and R.sup.10 has the meaning of R.sup.9 or represents an optionally substituted heterocyclic ring,Y.sup.1 to Y.sup.4 are identical or different and represent hydrogen, halogen, nitro, cyano, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylthio, alkylsulfonyl or halogenolkylthio,R.sup.1 to R.sup.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: December 6, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd-Wieland Kruger, Klaus Sasse, Peter Heitkamper, Klaus Konig, Wilhelm Brandes, Gerd Hanssler, Albrecht Marhold
  • Chloro-(2-halogeno-1-fluoromethyl-ethoxy)-methanes and their preparation
    Patent number: 5371300
    Abstract: The present invention relates to novel chloro-(2-halogeno-1-fluoromethyl-ethoxy)-methanes and to their preparation. The novel compounds can be used as intermediates for the preparation of biologically active substituted benzimidazoles.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: December 6, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stefan Bohm, Albrecht Marhold
  • Process for the preparation of 5-(trifluoromethyl)-uracil, and the novel compounds 2,4-dichloro-5-trichloromethyl-pyrimidine and 2,4-difluoro-5-trifluoromethyl-pyrimidine
    Patent number: 5352787
    Abstract: 5-Trifluoromethyl-uracil is obtained by chlorinating thymine under mild conditions, further chlorinating the resulting 2,4-dichloro-5-methyl-pyrimidine under drastic conditions to give 2,4-dichloro-5-trichloromethylpyrimidine, reacting the latter with a fluorinating agent to give 2,4-fluorinated and/or -chlorinated 5- trifluoromethylpyrimidines and subjecting these to hydrolysis. The novel chemical compounds 2,4-dichloro- 5-trichloromethylpyrimidine and 2,4-difluoro-5-trifluoromethylpyrimidine are obtained in the course of this process.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: October 4, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Andres, Albrecht Marhold
  • Circulation-active dioxyalkylenearyl-dihydropyridines
    Patent number: 5344944
    Abstract: Circulation-active dihydropyridines of the formula ##STR1## in which R.sup.1 is H, CN, NO.sub.2 or --COOR.sup.7,R.sup.7 is H, alkyl or various other radicals,R.sup.2 and R.sup.4 each independently is alkyl or other radicals,R.sup.3 is H or optionally substituted alkyl, andR.sup.5 completes a keto or ester group,and physiologically acceptable salts thereof.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: September 6, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Franckowiak, Albrecht Marhold, Martin Bechem, Rainer Gross, Michael Kayser, Matthias Schramm, Gunther Thomas
  • Process for preparing 1-fluorocyclopropyl methyl ketone
    Patent number: 5336809
    Abstract: A new process for the preparation of 1-fluorocyclopropyl methyl ketone of the formula ##STR1## which process comprises a) in a first step, reacting 2-acetyl-2-chloro-4-butanolide of the formula ##STR2## with an addition product of triethylamine and hydrogen fluoride of the formula(C.sub.2 H.sub.5).sub.3 N.multidot.n HFin whichn represents the numbers 1, 2 or 3,in the presence of a diluent at a temperature between 20.degree. C. and 120.degree. C. andb) in a second step, reacting the resulting 2-acetyl-2-fluoro-4-butanolide of the formula ##STR3## with a nucleophilic agent in the presence of a diluent at a temperature between 50.degree. C. and 200.degree. C.New halogenoketones of the formula ##STR4## in which Hal represents chlorine or bromine.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: August 9, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stefan Bohm, Albrecht Marhold
  • Process for the preparation of hexafluorobutane, and intermediates thereby obtainable
    Patent number: 5315047
    Abstract: 1,1,1,4,4,4-Hexafluorobutane is prepared by first reacting 1,1,3,4,4-pentachlorobuta-1,3-diene with hydrogen fluoride in the presence of catalysts at 60.degree. to 180.degree. C. to give 1,1,1,4,4,4-hexafluoro-2-chlorobutane, and converting this to 1,1,1,4,4,4-hexafluorobutane. On working up the product of the first stage of the process, it is possible to isolate novel compounds of formula (I):CF.sub.2 X--CH.sub.2 --R (I)in whichX is fluorine or chlorine andR is --CHCl--CF.sub.2 Cl, --CHCl--CFCl.sub.2 or --CCl.dbd.CCl.sub.2.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: May 24, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Norbert Lui, Albrecht Marhold, Dietmar Bielefeldt
  • Copolymerizable fluorinated compounds, a process for their preparation and thermoplastic fluoropolymers obtainable therefrom
    Patent number: 5313003
    Abstract: A 2-allyl-perfluoroalkyl-trifluorovinyl ether of the formula ##STR1## wherein R.sup.1.sub.F and R.sup.2.sub.F represent either --CF.sub.3 or, together, (CF.sub.2).sub.n where n=2 or 3.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: May 17, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Kruger, Michael Negele, Albrecht Marhold
  • Process for the preparation of halogenated aromatics
    Patent number: 5306849
    Abstract: Halogenated aromatics are prepared by heating halogenoformic acid esters to 80.degree. to 280.degree. C. in the presence of hydrogen fluoride or a catalytic amount of one or more Lewis acids from the group comprising aluminium halides, iron halides and antimony halides, and in the liquid phase.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: April 26, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Norbert Lui, Dietmar Bielefeldt, Albrecht Marhold
  • Process for the dechlorination and/or debromination of fluorine-and chlorine- and/or bromine-containing aromatic compounds
    Patent number: 5283378
    Abstract: Fluorine- and chlorine- and/or bromine-containing aromatic compounds are dechlorinated and/or debrominated with hydrogen in an industrially advantageous and selective manner, if the palladium catalyst is present in stationary phase and the aromatic compound in gas phase.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: February 1, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dietmar Bielefeldt, Albrecht Marhold
  • Derivatives of 2,2-dihalogenobenzo[1,3]dioxoles substituted in the 4-position, processes for their preparation and their use
    Patent number: 5281725
    Abstract: New 2,2-dihalogeno-benzo[1,3]dioxoles substituted in the 4-position, of the general formula (I) ##STR1## in which R represents fluorine, chlorine, bromine or nitro andHal represents chlorine or fluorine, and their use as starting substances for the synthesis of highly active compounds, for example in the field of plant protection and pharmaceuticals.The compounds of the formula (I) can be prepared by analogous processes, for example by chlorination from corresponding benzo[1,3]dioxoles substituted in the 4-position, and these substances according to the invention can be further reacted with hydrogen fluoride to give substances to which the invention likewise relates.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: January 25, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Andres, Albrecht Marhold