Patents Represented by Attorney, Agent or Law Firm Karen C. Richardson
  • Polypropylene impact copolymer having bimodal sized rubber particles
    Patent number: 6660808
    Abstract: Polypropylene impact copolymers and methods of making them are provided. These impact copolymers achieve a balance between stiffness and impact strength and additionally higher gloss by the inclusion therein of a bimodal distribution of rubber particles.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: December 9, 2003
    Assignee: Sunoco Inc. (R&M)
    Inventor: Sehyun Kim
  • Polymerization of alpha-methylstyrene
    Patent number: 6649716
    Abstract: A process for producing polymers of &agr;-methylstyrene uses tin IV chloride as a polymerization initiator. Use of tin IV chloride as an initiator allows polymerization to proceed without purification of the monomer prior to processing. Polymerization can be carried out at ambient temperatures with mild exotherms and good polymer yields. The process uses solvents commonly found in a plant producing &agr;-methylstyrene.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: November 18, 2003
    Assignee: Sunoco, Inc. (R&M)
    Inventors: Ronald A. Andrekanic, Jeffrey S. Salek, Steven E. Mulhall, Yuriy V. Bubnov
  • Polypropylene materials with high melt flow rate and good molding characteristics and methods of making
    Patent number: 6599985
    Abstract: The present invention provides polypropylene made by dispersing at least one, cracking-resistant polymer therein for controlled rheology treatment to yield a polypropylene polymer with a high melt flow rate and good molding characteristics.
    Type: Grant
    Filed: October 8, 2001
    Date of Patent: July 29, 2003
    Assignee: Sunoco Inc. (R&M)
    Inventors: Masaki Fujii, Sehyun Kim
  • Polypropylene film having good drawability in a wide temperature range and film properties
    Patent number: 6596814
    Abstract: The present invention provides polypropylene films and methods of making these films using high melt strength &bgr;-crystalline polypropylene. The films of the present invention are opaque, porous and have good physical properties, such as being capable of cold drawing to a thin gauge without breaking.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: July 22, 2003
    Assignee: Sunoco Inc. (R&M)
    Inventors: Sehyun Kim, Masaki Fujii
  • Ringing kettle
    Patent number: 6494160
    Abstract: An apparatus for boiling a liquid includes an audible alarm for notifying an individual when the liquid is boiling. The audible alarm makes use of steam generated by the boiling liquid to drive a turbine which is connected to a means for ringing a bell to notify an individual that the liquid is boiling.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: December 17, 2002
    Assignee: Kamenstein Corporation
    Inventor: Schmidt George