Patents by Inventor Danny L. Wise

Danny L. Wise 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).

  • High molecular weight, medium density polyethylene
    Patent number: 6770715
    Abstract: A high molecular weight, medium density polyethylene (HMW, MDPE) is disclosed. The polyethylene comprises from about 85 to about 98 wt % of recurring units of ethylene and about 2 to about 15 wt % of a C3-C10 &agr;-olefin. It has a density from about 0.92 to about 0.944 g/cc, a melt index MI2 from about 0.01 to about 0.5 dg/min, and a melt flow ratio MFR from about 50 to about 300. It has a multimodal molecular weight distribution comprising a high molecular weight component and a low molecular weight component. The low molecular weight component has an MI2 from about 50 to about 600 dg/min and a density from about 0.94 to about 0.97 g/cc. A process for making the medium density polyethylene is also disclosed. The process uses a Ziegler catalyst and applies multiple reaction zones.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: August 3, 2004
    Assignee: Equistar Chemicals, LP
    Inventors: Philip J. Garrison, Lawrence R. Wallace, Danny L. Wise, James H. Meas, Leonard V. Cribbs, Jean A. Merrick-Mack, Paula L. Nygard
  • High molecular weight, medium density polyethylene
    Publication number: 20030040588
    Abstract: A high molecular weight, medium density polyethylene (HMW, MDPE) is disclosed. The polyethylene comprises from about 85 to about 98 wt % of recurring units of ethylene and about 2 to about 15 wt % of a C3-C10 &agr;-olefin. It has a density from about 0.92 to about 0.944 g/cc, a melt index MI2 from about 0.01 to about 0.5 dg/min, and a melt flow ratio MFR from about 50 to about 300. It has a multimodal molecular weight distribution comprising a high molecular weight component and a low molecular weight component. The low molecular weight component has an MI2 from about 50 to about 600 dg/min and a density from about 0.94 to about 0.97 g/cc. A process for making the medium density polyethylene is also disclosed. The process uses a Ziegler catalyst and applies multiple reaction zones.
    Type: Application
    Filed: September 12, 2002
    Publication date: February 27, 2003
    Applicant: Equistar Chemicals, LP
    Inventors: Philip J. Garrison, Lawrence R. Wallace, Danny L. Wise, James H. Meas, Leonard V. Cribbs, Jean A. Merrick-Mack, Paula L. Nygard
  • High molecular weight, medium density polyethylene
    Patent number: 6486270
    Abstract: A high molecular weight, medium density polyethylene (HMW, MDPE) is disclosed. The polyethylene comprises from about 85 to about 98 wt % of recurring units of ethylene and about 2 to about 15 wt % of a C3-C10 &agr;-olefin. It has a density from about 0.92 to about 0.944 g/cc, a melt index MI2 from about 0.01 to about 0.5 dg/min, and a melt flow ratio MFR from about 50 to about 300. It has a multimodal molecular weight distribution comprising a high molecular weight component and a low molecular weight component. The low molecular weight component has an MI2 from about 50 to about 600 dg/min and a density from about 0.94 to about 0.97 g/cc. A process for making the medium density polyethylene is also disclosed. The process uses a Ziegler catalyst and applies multiple reaction zones.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: November 26, 2002
    Assignee: Equistar Chemicals, LP
    Inventors: Philip J. Garrison, Lawrence R. Wallace, Danny L. Wise, James H. Meas, Jr., Leonard V. Cribbs, Jean A. Merrick-Mack, Paula L. Nygard