Patents by Inventor Steven Raymond Lustig

Steven Raymond Lustig 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).

  • Polymerizations based on cyclic oligomer
    Patent number: 6297330
    Abstract: This invention concerns a process for polymerizing cyclic oligomers to homopolymers or copolymers, conducted in the presence of one or more linear polymers.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: October 2, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Ray Burch, Jr., Alexa Ann Dembek, Steven Raymond Lustig, Maria Spinu
  • Catalysis with titanium oxides
    Patent number: 6034203
    Abstract: A process which can be used in oligomerization, polymerization, or depolymerization such as, for example, the production of a polyester is provided. The process comprises contacting a carbonyl compound, in the presence of a composition, with an alcohol. The catalyst comprises a catalyst having the formula of M.sub.x Ti.sup.(III) Ti.sup.(IV).sub.y O.sub.(x+3+4y)/2 wherein M is an alkali metal, Ti.sup.(III) is titanium in the +3 oxidation state, Ti.sup.(IV) is titanium in the +4 oxidation state, x and y are numbers greater than or equal to zero wherein if x equals zero, y is a number less than 1/2.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: March 7, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Steven Raymond Lustig, Robert Ray Burch, Eugene M. McCarron, III
  • Poly(alkylene arylates) having improved optical properties
    Patent number: 5981690
    Abstract: Poly(alkylene arylates) having excellent optical properties are disclosed and can be prepared using an organic titanate-ligand catalyst solution containing organic silicates and/or zirconates and, preferably, certain phosphorus compounds.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: November 9, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Steven Raymond Lustig, Robert Ray Burch