Patents by Inventor Wolfgang Gaenzler
Wolfgang Gaenzler 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).
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Patent number: 4656119Abstract: A method of producing X-ray resist with etching patterns, using known supports which are coated with a film comprised of copolymers of methacrylonitrile and methacrylic acid is disclosed. This method uses the following protocol.(a) A copolymer of methacrylonitrile and methacrylic acid with molecular weight <700,000 is used for coating the support.(b) Before X-ray irradiation, the film is thermally treated at temperatures below 150.degree. C. until a solvent-free, uncrosslinked film is obtained.(c) After the X-ray irradiation, the film is tempered for 15-30 min at temperatures in the range 140.degree.-170.degree. C.(d) And subsequently the film is developed with a solvent system L comprised of water and/or an organic solvent which contains oxygen in the form of a hydroxyl group and/or an ether group and/or an ester group.Type: GrantFiled: November 27, 1985Date of Patent: April 7, 1987Assignees: Rohm GmbH Chemische Fabrik, Max-Planck-Gesellschaft Zur Foerderund der WissenschaftenInventors: Frithjof Asmussen, Wolfgang Gaenzler, Winfried Wunderlich
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Patent number: 4647696Abstract: What is disclosed is a continuous one-step method for the preparation of isobutyric acid or a lower alkyl ester thereof by the Koch synthesis, which method comprises reacting propylene, carbon monoxide, and water or a lower alcohol, in the gaseous and liquid phases, in the presence of hydrogen fluoride as a Koch catalyst, at a temperature between 80.degree. C. and 160.degree. C., at a dwell time of the liquid phase of less than 20 minutes, and with a high degree of backmixing, while maintaining the content of propylene in the reaction mixture at less than one percent by weight of the liquid phase, wherein all or part of the propylene, carbon monoxide, and water or lower alcohol can be replaced by binary addition compounds formed pairwise between these materials. In the alternative, isopropylformiate can be continuously rearranged in the presence of hydrogen fluoride to produce isobutyric acid.Type: GrantFiled: March 14, 1983Date of Patent: March 3, 1987Assignee: Rohm GmbHInventors: Siegmund Besecke, Guenter Schroeder, Hermann-Josef Siegert, Wolfgang Gaenzler
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Patent number: 4576971Abstract: Flame retarded polyacrylimide or polymethacrylimide resin foams containing at least 70 percent by weight of cyclic acrylimide or methacrylimide units and incorporating at least 1 percent by weight of phosphorus, present at least partially in the form of a phosphorus compound, XCH.sub.2 --PO(OR).sub.2, wherein R is methyl, ethyl, or chloromethyl, and X is hydrogen, halogen, hydroxyl, or RO--CO--.Type: GrantFiled: December 18, 1984Date of Patent: March 18, 1986Assignee: Rohm GmbHInventors: Ehrenfried Baumgartner, Siegmund Besecke, Wolfgang Gaenzler
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Patent number: 4452999Abstract: What is disclosed is a continuous one-step method for the preparation of isobutyric acid or a lower alkyl ester thereof by the Koch synthesis, which method comprises reacting propylene, carbon monoxide, and water or a lower alcohol, in the gaseous and liquid phases, in the presence of hydrogen fluoride as a Koch catalyst, at a temperature between 80.degree. C. and 160.degree. C., at a dwell time of the liquid phase of less than 20 minutes, and with a high degree of backmixing, while maintaining the content of propylene in the reaction mixture at less than one percent by weight of the liquid phase, wherein all or part of the propylene, carbon monoxide, and water or lower alcohol can be replaced by binary addition compounds formed pairwise between these materials. In the alternative, isopropylformiate can be continuously rearranged in the presence of hydrogen fluoride to produce isobutyric acid.Type: GrantFiled: May 21, 1982Date of Patent: June 5, 1984Assignee: Rohm GmbHInventors: Siegmund Besecke, Guenter Schroeder, Hermann-Josef Siegert, Wolfgang Gaenzler
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Patent number: 4228102Abstract: What is disclosed is a method for making amides of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl,R.sub.3 is straight-chain or branched alkyl or unsubstituted or substituted aryl, andR.sub.4 is hydrogen or straight-chain or branched unsubstituted or substituted alkyl, which comprises reacting an ester of the formula ##STR2## wherein R.sub.2 is alkyl having 1 to 6 carbon atoms, with heating and under autogenous pressure, in a homogeneous phase, with an amine of the formula ##STR3## said amine being present in an amount which is stoichiometrically deficient up to an amount which is in small stoichiometric excess with respect to said ester.Type: GrantFiled: February 23, 1979Date of Patent: October 14, 1980Assignee: Rohm GmbHInventors: Siegmund Besecke, Wolfgang Gaenzler, Guenter Schroeder
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Patent number: 4147718Abstract: In the method of making a compound of the formula ##STR1## wherein X is carboxyl, a carboxylic acid ester group --COOR.sub.2, or cyano, by reaction of a compound of the formula CH.sub.3 CH.sub.2 X with methylal in the presence of a catalyst, the improvement wherein said catalyst is a catalyst system which consists essentially of (1) silicon dioxide dosed with a basic component and (2) a member selected from the group consisting of aluminum oxide and titanium dioxide.Type: GrantFiled: January 16, 1978Date of Patent: April 3, 1979Assignee: Rohm GmbHInventors: Wolfgang Gaenzler, Klaus Kabs, Guenter Schroeder
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Patent number: 4113762Abstract: A method for making a carbonic acid ester of the formula ##STR1## wherein R is --CH.sub.3, --C.sub.2 H.sub.5, or --C.sub.3 H.sub.7, which comprises reacting the corresponding alcohol, ROH, with carbon monoxide and oxygen, under pressure and at elevated temperature, in the presence of a copper-containing catalyst, said catalyst being a complex formed between copper-I-chloride and vanadium trichloride, chromium trichloride, iron trichloride, cobalt-II-chloride, aluminum trichloride, or silicon tetrachloride.Type: GrantFiled: August 25, 1977Date of Patent: September 12, 1978Assignee: Rohm GmbHInventors: Wolfgang Gaenzler, Klaus Kabs, Guenter Schroeder
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Patent number: 4069381Abstract: An improved method for making glycol monoesters and diesters of carboxylic acid by the reaction of an olefin and oxygen in the presence of a carboxylic acid and a catalyst, wherein said catalyst includes a compound of a metal of groups IVB - VIIB having an atomic number between 40 and 42 inclusive or between 72 and 75 inclusive, i.e. zirconium, niobium, molybdenum, hafnium, tantalum, tungsten, or rhenium.Type: GrantFiled: November 12, 1973Date of Patent: January 17, 1978Assignee: Rohm GmbHInventors: Wolfgang Gaenzler, Klaus Kabs, Guenter Schroeder
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Patent number: 3960934Abstract: A process for the catalytic oxycarbonylation of ethylene and propylene by reaction with carbon monoxide and oxygen in a methanolic or ethanolic reaction medium employing a catalyst which contains a compound of vanadium, chromium, iron, cobalt, nickel or copper and chloride, bromide, or iodide ions.Type: GrantFiled: March 24, 1975Date of Patent: June 1, 1976Assignee: Rohm GmbHInventors: Wolfgang Gaenzler, Klaus Kabs, Guenter Schroeder
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Patent number: 3952045Abstract: A method for preparing carbonic acid esters, ##EQU1## by reacting an alcohol, ROH, with carbon monoxide and oxygen in the presence of a catalyst comprising a copper salt, chloride or bromide, and an organic phosphorus compound such as a phosphine oxide, phosphite, phosphate, or phosphonate.Type: GrantFiled: July 3, 1974Date of Patent: April 20, 1976Assignee: Rohm GmbHInventors: Wolfgang Gaenzler, Guenter Schroeder, Klaus Kabs