Patents by Inventor Eva Ellmann

Eva Ellmann 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 decabromodiphenyl ether with improved thermal stability
    Patent number: 4871882
    Abstract: A process for the preparation of Decabromodiphenyl ether is disclosed, which employs dibromomethane as the reaction medium, at temperatures not exceeding 80.degree. C.The product obtained by the process of the invention possesses improved thermal stability.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: October 3, 1989
    Assignee: Bromine Compounds Limited
    Inventors: Hyman Stollar, Khaim Khariton, Mark Grinberg, Eva Ellmann
  • Method for the preparation of decabromodiphenyl ether
    Patent number: 4849547
    Abstract: A process for the preparation of decabromodiphenyl ether by the reaction of diphenyl ether or of a partially brominated derivative thereof, in a mixture of halogenated organic solvents is described.The process of the invention provides a product having improved thermal stability. The process can be carried out in a quasi-steady state manner, thereby producing a product with constant quality.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: July 18, 1989
    Assignee: Bromine Compounds Limited
    Inventors: Hyman Stollar, Khaim Khariton, Mark Grinberg, Eva Ellmann
  • Flame retardant polymer compositions
    Patent number: 4725638
    Abstract: The present invention relates to flame retardant polymer compositions comprising a flammable polymer and an amount of between 1% to 40% by weight of tetrabromodipentaerythritol as flame retardant agent. Optionally, synergistic flame retardant additives such as antimony oxide are incorporated in the compositions. The flammable polymers are selected from polyolefins, polyamides and styrenic resins or mixtues thereof. The flame retardant agent according to the present invention imparts to the polymer compositions improved thermal aging behaviour, thermal stability and non blooming property, compared with known flame retardant agents.
    Type: Grant
    Filed: September 12, 1986
    Date of Patent: February 16, 1988
    Assignee: Bromine Compounds, Ltd.
    Inventors: Eva Ellmann, Shaul Yanai, Pierre Georlette, Avraham Teurestein