Patents by Inventor Bela Ivan

Bela Ivan 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).

  • Method for producing carboxyl-terminated polyisobutenes
    Patent number: 7579412
    Abstract: The present invention relates to a process for preparing carboxyl-terminated polyisobutenes by ozonolysis of polyisobutenes terminated by an ethylenically unsaturated double bond.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: August 25, 2009
    Assignee: BASF Aktiengesellschaft
    Inventors: Arno Lange, Helmut Mach, Hans Peter Rath, Ulrich Karl, Bela Ivan, Peter Werner Groh, Zsuzsanna Tamara Nagy, Viktoria Palfi
  • Method for producing carboxyl-terminated polyisobutenes
    Publication number: 20060276588
    Abstract: The present invention relates to a process for preparing carboxyl-terminated polyisobutenes by ozonolysis of polyisobutenes terminated by an ethylenically unsaturated double bond.
    Type: Application
    Filed: May 14, 2004
    Publication date: December 7, 2006
    Inventors: Arno Lange, Helmut Mach, Hans Rath, Ulrich Karl, Bela Ivan, Peter Groh, Zsuzsanna Nagy, Viktoria Palfi
  • Use of quaternized dialkylaminoalkyl (meth) acrylates as soil release polymers for hard surfaces, and a method for production thereof
    Publication number: 20040254091
    Abstract: The invention relates to the use of polymers of the formula (1) 1
    Type: Application
    Filed: July 7, 2004
    Publication date: December 16, 2004
    Inventors: Gerhard Crass, Bela Ivan, Gabor Erdodi, Arpad Mathe
  • Polymers with biocidal action, process for their preparation and their use
    Publication number: 20030191264
    Abstract: The invention relates to polymers consisting essentially of structural units of the formula (1) 1
    Type: Application
    Filed: January 28, 2003
    Publication date: October 9, 2003
    Applicant: Clariant GmbH
    Inventors: Gerhard Crass, Uwe Falk, Bela Ivan, Gabor Erdodi, Arpad Mathe
  • Living carbocationic polymerization of poly(isobutylene-.beta.-methyl vinyl ether)
    Patent number: 5225492
    Abstract: The synthesis of poly(isobutylene-b-methyl vinyl ether) (PIB-b-PMeVE) by living carbocationic polymerization (LC.sym.Pzn) employing the sequential monomer addition (SMA) technique is described. The process starts by producing the living PIB.sym. block employing the 2-chloro-2,4,4-trimethylpentane (TMPC11/TiCl.sub.4 initiating system in the presence of the common ion salt tetra-n-butylammonium chloride (n-Bu.sub.4 NCl) in CH.sub.3 Cl/n-C.sub.6 H.sub.14 or CH.sub.2 Cl.sub.2 /n-C.sub.6 H.sub.14 mixed solvents at -80.degree. C. and continues by the addition of methyl vinyl ether (MeVE). The second living block forms only in the presence of excess TiCl.sub.4 suggesting that the species that starts the second block and subsequently sustains its growth is a MeVE.multidot.TiCl.sub.4 complex. The stoichiometry of this complex (1:1 or 1:2) is uncertain. The TiCl.sub.4 remains attached to the MeVE units after their incorporation into the diblock, however, it can be readily removed by water.
    Type: Grant
    Filed: February 13, 1992
    Date of Patent: July 6, 1993
    Assignee: The University of Akron
    Inventors: Joseph F. Kennedy, Tibor Pernecker, Bela Ivan
  • Amphiphilic networks
    Patent number: 5073381
    Abstract: New controlled and/or sustained drug release amphiphilic compositions based on various amphiphilic networks of the present invention are described. New processes for manufacturing amphiphilic networks are also described. These new processes allow for the production of more diverse amphiphilic networks. The controlled and/or sustained drug release properties of the networks of the present invention show release controlled and sustained release profiles for 20 hours or more and Fickian and non-Fickian diffusion rates.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: December 17, 1991
    Assignee: University of Akron
    Inventors: Bela Ivan, Joseph P. Kennedy, Paul W. Mackey