Patents by Inventor Carl Casser

Carl Casser 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 substituted cycloalkylidene bisphenols
    Patent number: 5210328
    Abstract: This invention relates to a process for the preparation of substituted cycloalkylidene bisphenols from phenols and special cycloalkanones in the presence of acid condensation catalysts and in the presence of water.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: May 11, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter Freitag, Claus H. Wulff, Alfred Eitel, Helmut Waldmann, Uwe Westeppe, Manfred Hajek, Klaus D. Berg, Bernd Griehsel, Carl Casser
  • Polycarbonate from dihydroxy diphenyl cycloalkane
    Patent number: 5126428
    Abstract: Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl,m is an integer of from 4 to 7,R.sup.3 and R.sup.4, individually selectable for each X, independently of one another represent hydrogen or C.sub.1 -C.sub.6 alkyl andX represents carbon with the proviso that, at least one atom X, bothR.sup.3 and R.sup.4 are alkyl,a process for their production, their use for the production of high molecular weight polycarbonates, the polycarbonates made from dihydroxydiphenyl cycloalkane of formula (I) and films made from these polycarbonates.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: June 30, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter Freitag, Uwe Westeppe, Claus H. Wulff, Karl-Herbert Fritsch, Carl Casser, Gunther Weymans, Lutz Schrader, Werner Waldenrath
  • Polycarbonate of cycloalkylidene bisphenol
    Patent number: 5010163
    Abstract: Thermoplastic aromatic polycarbonates having average molecular weight Mw of at least 10,000 which contain bifunctional carbonate structural units corresponding to formula (I) ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another represent hydrogen, a C.sub.1 -C.sub.12 -hydrocarbon, halogen,m is 2 or 3 andX represents hydrogen or a C.sub.6 -C.sub.12 hydrocarbon, at least one substituent X being a C.sub.6 -C.sub.12 hydrocarbon radical,in quantities of from 100 to 1 mol-% based on the total quantity of difunctional carbonate structural units in the polycarbonate.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: April 23, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Volker Serini, Dieter Freitag, Uwe Westeppe, Karsten Idel, Ulrich Grigo, Carl Casser, Klaus-Christian Paetz, Manfred Hajek
  • Polycarbonate of alkyl cyclohexylidene bisphenol
    Patent number: 5010162
    Abstract: Thermoplastic aromatic polycarbonates having average molecular weights Mw of at least 10,000 which contain bifunctional carbonate structural units corresponding to formula (I) ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another represent hydrogen, a C.sub.1 -C.sub.12 hydrocarbon radical, halogen andR.sup.5, R.sup.6 and R.sup.7 represent hydrogen, iso-C.sub.3 -C.sub.5 -alkyl,one of the substituents R.sup.5, R.sup.6 or R.sup.7 not being hydrogen, in quantities of from 100 to 1 mol-%, based on the total quantity of difunctional carbonate structural units in the polycarbonate.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: April 23, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Volker Serini, Dieter Freitag, Uwe Westeppe, Karsten Idel, Ulrich Grigo, Carl Casser, Klaus-Christian Paetz, Manfred Hajek
  • Dihydroxydiphenyl cycloalkanes, their production and their use for the production of high molecular weight polycarbonates
    Patent number: 4982014
    Abstract: Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl,m is an integer of from 4 to 7,R.sup.3 and R.sup.4, individually selectable for each X, independently of one another represent hydrogen or C.sub.1 -C.sub.6 alkylandX represents carbonwith the proviso that, at at least one atom X, both R.sup.3 and R.sup.4 are alkyl, a process for their production, their use for the production of high molecular weight polycarbonates, the polycarbonates made from dihydroxydiphenyl cycloalkane of formula (I) and films made from these polycarbonates.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: January 1, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter Freitag, Uwe Westeppe, Claus H. Wulff, Karl-Herbert Fritsch, Carl Casser, Gunther Weymans, Lutz Schrader, Werner Waldenrath
  • Thermotropic, fully aromatic polyesters having a low processing temperature, a process for their production and their use for the production of moldings, filaments, fibers and films
    Patent number: 4970286
    Abstract: Thermotropic polyesters containing recurring structural units corresponding to the following formulae ##STR1## can be processed at low temperatures and may be used for the production of moldings, filaments, fibers and films.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: November 13, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Joachim Genz, Volker Eckhardt, Karsten-Josef Idel, Carl Casser