Patents by Inventor Raju Raghavan

Raju Raghavan 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 polymerization of olefins
    Patent number: 7084216
    Abstract: The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst composition comprising: (a) a solid catalyst precursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising an aluminum compound.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: August 1, 2006
    Assignee: Saudi Basic Industries Corporation
    Inventors: Akhlaq A. Moman, Khalid Al-Bahily, Atieh Abu-Raqabah, John Ledford, Orass M. Hamed, Raju Raghavan, Sameh Rizkallah
  • Process for the polymerization of olefins
    Publication number: 20050101749
    Abstract: The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst composition comprising: (a) a solid catalyst precursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising an aluminum compound.
    Type: Application
    Filed: January 30, 2002
    Publication date: May 12, 2005
    Inventors: Akhlaq Moman, Khalid Al-Bahily, Atieh Abu-Raqabah, John Ledford, Orass Hamed, Raju Raghavan, Sameh Rizkallah
  • Process for polymerizing olefins with supported Ziegler-Natta catalyst systems
    Publication number: 20030045659
    Abstract: A catalytic polymerization process for preparing polymer products is provided. The polymerization process is either homopolymerization of olefins or copolymerization of olefins with alpha-olefins. The polymerization process is conducted in the presence of a solid catalyst precursor and a cocatalyst. The catalyst precursor includes a transition metal, a magnesium compound, an aluminum compound and polymeric particles.
    Type: Application
    Filed: August 23, 2002
    Publication date: March 6, 2003
    Applicant: Saudi Basic Industries Corporation
    Inventors: Akhlaq Moman, Atieh Abu-Raqabah, Orass Hamed, Raju Raghavan
  • Process for polymerizing olefins with supported Ziegler-Natta catalyst systems
    Patent number: 6448348
    Abstract: A catalytic polymerization process for preparing polymer products is provided. The polymerization process is either homopolymerization of olefins or copolymerization of olefins with alpha-olefins. The polymerization process is conducted in the presence of a solid catalyst precursor and a cocatalyst. The catalyst precursor includes a transition metal, a magnesium compound, an aluminum compound and a polyvinylchloride (PVC) support.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: September 10, 2002
    Assignee: Saudi Basic Industries Corporation
    Inventors: Akhlaq Moman, Atieh Abu-Raqabah, Orass Hamed, Raju Raghavan
  • Alumoxane-enhanced, supported ziegler-natta polymerization catalysts, methods of making same, processes of using same and polymers produced therefrom
    Patent number: 6124412
    Abstract: The present invention relates to a new olefin polymerization catalyst composition, and methods of preparing and methods of using the catalysts to polymerize various olefinic monomers in either gas or slurry phase reactions. The principal advance over the previous art of record involves using alumoxanes or combinations of alumoxanes as catalyst preactivators. Polymers prepared from these catalysts posses productivity increased as high as 40 percent. At the same time, the bulk density remains relatively constant. Additionally, the total amount of cocatalyst species needed to effectively practice the invention is relatively low.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: September 26, 2000
    Assignee: Saudi Basic Industries Corporation
    Inventors: Abdulmalik Bin-Taleb, Raju Raghavan, Abdulwhab Al-Sadoon