Patents Represented by Attorney, Agent or Law Firm Maria C. Walsh
  • Oxygen tailoring of polyethylene film resins
    Patent number: 6989423
    Abstract: Processes are disclosed for oxygen-tailoring polyethylene resin. Polyethylene resin is conveyed through a feed zone, a melt-mixing zone and a melt zone. The resin is contacted with oxygen in an amount of at least 40 parts by weight O2 per million parts by weight resin, and contacted with primary antioxidant downstream of the point or points of oxygen contact. The oxygen-treated resin can be used to make polyethylene film having improved gauge uniformity.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: January 24, 2006
    Assignee: ExxonMobil Chemical Patents, Inc.
    Inventors: James E. Wagner, Jerry M. Johnson, Dale J. Joy, Wesley J. Robertson, Timothy J. Cowell
  • Inlet distribution device for upflow polymerization reactors
    Patent number: 6958376
    Abstract: A polymerization process and polymerization reactor are provided. For example, a polymerization process is described, including passing a feed stream including liquid and gas through a feed stream inlet disposed proximate an upflow polymerization reactor, passing the feed stream through a member configured to impart an angular velocity to the feed stream and entrain the liquid in the gas, and contacting the feed stream with a catalyst to polymerize the feed stream.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: October 25, 2005
    Assignee: Exxonmobil Chemical Patents Inc.
    Inventor: Gregory P. Muldowney
  • Synthesis of functionalized esters
    Patent number: 6175024
    Abstract: A method of preparing an ester of a carboxylic acid functionalized with a moiety selected from the group consisting of halides, sulfonates, ethers, hydroxyl, amines, and aldehydes, said method comprising: (a) providing either a carboxylic acid having a vinyl group or an ester thereof; (b) functionalizing the vinyl carbon closest to the carboxyl group with said moiety, wherein said functionalizing comprises cleaving said vinyl group.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: January 16, 2001
    Assignee: AlliedSignal Inc.
    Inventors: William J. Boyle, Jr., Indira Reddy, Zhenrong Qian, Heng Eric Su, David Ryckman
  • Process for the production of alkoxycarbonyldipeptides intermediates in the synthesis of the lisinopril
    Patent number: 6166217
    Abstract: Process for the production of alkoxycarbonyldipeptides intermediates in the synthesis of the lisinopril which comprises protecting both amino functions of the L-lysine with an alkoxycarbonyl group, subsequently making the N-carboxyanhydride of the N6-[alkoxycarbonyl]-L-lysine by treatment with thionyl chloride and making the desired alkoxycarbonyldipeptide by reaction with L-proline in alkaline medium.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: December 26, 2000
    Assignee: AlliedSignal Inc.
    Inventors: Vincenzo Cannata, Valeriano Merli, Stefano Saguatti