Patents by Inventor Ferenc Tudos

Ferenc Tudos 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 producing polymers with a polydispersity optionally approaching the theoretical one and substituted by functional groups in .alpha., .omega.-positions, by radical polymerization
    Patent number: 5126415
    Abstract: The invention relates to a process for preparing polymers, with a polydispersity optionally approaching the theoretical polydispersity and substituted by functional groups in .alpha.,.omega.-positions, via radical polymerization of radically polymerizable monomers and using one or more initiators. In compliance with this process the degree of polymerization is maintained at the desired value by continuous elevation of the temperature.In case of a given heat program, the process of the invention renders possible to increase the conversion in producing polymers without the deterioration of the polydispersity.
    Type: Grant
    Filed: May 11, 1990
    Date of Patent: June 30, 1992
    Assignee: MTA Kozponti Kemiai Kutato Intezete
    Inventors: Tamara Foldes nee Berezsnich, Gyorgyi Miketa nee Fenyvesi, Andras Nagy, Tibor Pernecker, Arpad Rehak, Daniel Szalay, Ferenc Tudos
  • Sorbents of cellulose basis capable of forming inclusion complexes and a process for the preparation thereof
    Patent number: 4357468
    Abstract: The invention relates to new sorbents of cellulose basis capable of forming inclusion complexes, as well as to a process for the preparation thereof. The new sorbents according to the invention are cellulose derivatives containing structural units of the general formula (I), ##STR1## wherein Cell is a group derived by removing m hydroxy groups from the glucose unit of the cellulose chain,m is an integer of 1 to 3,CD is a group derived by removing one hydroxy group from the .alpha., .beta. or .gamma.-cyclodextrin molecule,n is an integer of 1 to 5, andp stands for 0 or 1, which may optionally vary even within a single chain.The cellulose derivatives according to the invention are substances of loose structure, with large specific surface area and good swelling properties, which can be applied for solving the most diverse adsorption tasks. Thus e.g.
    Type: Grant
    Filed: July 31, 1981
    Date of Patent: November 2, 1982
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Rt.
    Inventors: Jozsef Szejtli, Bela Zsadon, Eva Fenyvesi, nee Otta Horvath, Ferenc Tudos
  • Cyclodextrin-polyvinyl alcohol polymers and a process for the preparation thereof in a pearl, foil, fiber or block form
    Patent number: 4274985
    Abstract: The present invention concerns new cyclodextrin-polyvinyl alcohol polymers capable of forming inclusion complexes. The preparation of said polymers by cross-linking a cyclodextrin, a mixture of cyclodextrins, or carbohydrate mixtures containing cyclodextrins in the presence of polyvinyl alcohol, polyvinyl acetate or a polyvinyl alcohol-polyvinyl acetate copolymer, with a polyfunctional coupling reactant capable of reacting with the cyclodextrins and with the polymers present is also within the scope of the invention.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: June 23, 1981
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Rt.
    Inventors: Jozsef Szejtli, Eva Fenyvesi, Sandor Zoltan, Bela Zsadon, Ferenc Tudos