Patents by Inventor May-Lis Andersson

May-Lis Andersson 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).

  • Pressureless polymer pipe
    Patent number: 7737222
    Abstract: A pressureless pipe and polymer composition for making such a pipe as well as the use of the polymer composition for pressureless pipes and supplementary parts, are disclosed. The polymer composition is characterized in that the polymer comprises a multimodal ethylene polymer including a copolymer of ethylene and a C4-C10 &agr; -olefin comonomer; the ethylene polymer has a total density of 953-958 kg/m3 and a MFR5 of 0.2-2.0 g/10 min; the ethylene polymer has a modulus of elasticity, determined according to ISO 178 of 1300-1700 MPa; the ethylene polymer has a resistance to slow crack growth, determined according to ASTM F 1473 of more than 1.5 hrs.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: June 15, 2010
    Assignee: Borealis Technology Oy
    Inventors: Mats Bäckman, May-Lis Andersson, Carl-Gustaf Ek, Kenneth Lund, Markku Vahteri
  • Pressureless Polymer Pipe
    Publication number: 20070207281
    Abstract: A pressureless pipe and polymer composition for making such a pipe as well as the use of the polymer composition for pressureless pipes and supplementary parts, are disclosed. The polymer composition is characterised in that the polymer comprises a multimodal ethylene polymer including a copolymer of ethylene and a C4-C10 &agr; -olefin comonomer; the ethylene polymer has a total density of 953-958 kg/m3 and a MFR5 of 0.2-2.0 g/10 min; the ethylene polymer has a modulus of elasticity, determined according to ISO 178 of 1300-1700 MPa; the ethylene polymer has a resistance to slow crack growth, determined according to ASTM F 1473 of more than 1.5 hrs.
    Type: Application
    Filed: March 31, 2005
    Publication date: September 6, 2007
    Applicant: BOREALIS TECHNOLOGY OY
    Inventors: Mats Backman, May-Lis Andersson, Carl-Gustaf Ek, Kenneth Lund, Markku Vahteri