Patents by Inventor David A. Lake

David A. Lake 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).

  • Polyolefin additive composition comprising 3,4-dimethyl dibenzylidene sorbitol and rho-methyl dibenzylidene
    Patent number: 6586007
    Abstract: A specific combination of two different polyolefin clarifying and nucleating agents, namely 3,4-dimethyldibenzylidene sorbitol and p-methyldibenzylidene sorbitol is provided. Such a combination surprisingly provides improved clarification and crystallization temperatures to polypropylene articles and formulations, better than bis-p-methyldibenzylidene sorbitol alone and equivalent or better than 3,4-dimethyldibenzylidene sorbitol. Such a combination of compounds thus permits the utilization of a new additive for the purpose of modifying polyolefin properties, such as polypropylene clarification and nucleation. The inventive combination may be introduced within any polyolefin composition, again preferably polypropylene, which may then be molded into any shape or form. A method of producing a polyolefin plastic utilizing the inventive combination of compounds is also provided.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: July 1, 2003
    Assignee: Milliken & Company
    Inventors: K. David Lake, Jr., Nathan A. Mehl, Christopher Thomas Kochanowicz
  • Polyolefin additive composition comprising 3,4-dimethyl dibenzylidene sorbitol and rho-methyl dibenzylidene sorbitol
    Publication number: 20020161076
    Abstract: A specific combination of two different polyolefin clarifying and nucleating agents, namely 3,4-dimethyldibenzylidene sorbitol and p-methyldibenzylidene sorbitol is provided. Such a combination surprisingly provides improved clarification and crystallization temperatures to polypropylene articles and formulations, better than bis-p-methyldibenzylidene sorbitol alone and equivalent or better than 3,4-dimethyldibenzylidene sorbitol. Such a combination of compounds thus permits the utilization of a new additive for the purpose of modifying polyolefin properties, such as polypropylene clarification and nucleation. The inventive combination may be introduced within any polyolefin composition, again preferably polypropylene, which may then be molded into any shape or form. A method of producing a polyolefin plastic utilizing the inventive combination of compounds is also provided.
    Type: Application
    Filed: February 16, 2001
    Publication date: October 31, 2002
    Inventors: K. David Lake, Nathan A. Mehl, Christopher Thomas Kochanowicz
  • Divider for luggage and the like
    Patent number: 4889253
    Abstract: A divider for dividing a space, such as the interior of suitcases, drawers and the like, into individual smaller compartments of various dimensions. The divider includes a main divider of a fixed length, which divides the space into halves. A front and a rear sub-divider co-operate with the main divider for further dividing the halves into smaller compartments. Extension members co-operate with the main divider and the front sub-divider to alter their fixed lengths.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: December 26, 1989
    Inventors: Marius Schmulian, David A. Lake