Patents by Inventor Robert Clive Lansbury

Robert Clive Lansbury 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).

  • Patent number: T955009
    Abstract: There is disclosed a thermoplastic, film-forming composition comprising a blend ofA. a propylene-ethylene copolymer, the propylene content of the copolymer being from 95 to 99.75% by weight of the copolymer, andB. a polymer of an alpha-olefin of 4 to 10 carbon atoms copolymerized with from 0 to 10% by weight of the copolymer of an alpha-olefin of 2 to 10 carbon atoms,The alpha-olefin polymer constituting from 41 to 90% by weight of the composition.The propylene-ethylene copolymer preferably contains from 2 to 4% by weight of ethylene, and preferably, in granular form, exhibits a Melt Flow Index of from 10 to 200 g/10 minutes, measured according to ASTM/D1238-65T (Condition N).The alpha-olefin component of the blend is suitably a polymer, preferably a homo-polymer, of butene-1, and suitably has a Melt Flow Index, by the aforementioned test, of less than 50 g/10 minutes, preferably between 5 and 40 g/10 minutes.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: February 1, 1977
    Inventors: Robert Clive Lansbury, Thomas Geoffrey Heggs