Patents by Inventor Frederick A. Baltusis

Frederick A. Baltusis 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).

  • Method of making polyvinylidene difluoride structure
    Patent number: 4855163
    Abstract: A polyvinylidene difluoride structure with a critical surface energy of at least about 80 dynes/cm and a method of making such a structure comprising the steps of contacting a polyvinylidene difluoride structure with an alkalized solution, such as potassium hydroxide, to form activated sites on the surface of the structure; rinsing the activated structure to remove residual alkali; contacting the rinsed, activated structure with a solution of a polymerization initiator, such as potassium peroxydisulfate, and a polymerizable vinylic monomer, such as acrylic acid; and polymerizing and grafting the monomer to the activated structure to form a polyvinylidene difluoride structure with a critical surface energy of at least about 80 dynes/cm.
    Type: Grant
    Filed: May 24, 1988
    Date of Patent: August 8, 1989
    Assignee: Pall Corporation
    Inventors: Irving B. Joffee, Peter J. Degen, Frederick A. Baltusis
  • Polyvinylidene difluoride structure
    Patent number: 4774132
    Abstract: A polyvinylidene difluoride structure with a critical surface energy of at least about 80 dynes/cm and a method of making such a structure comprising the steps of contacting a polyvinylidene difluoride structure with an alkalized solution, such as potassium hydroxide, to form activated sites on the surface of the structure; rinsing the activated structure to remove residual alkali; contacting the rinsed, activated structure with a solution of a polymerization initiator, such as potassium peroxydisulfate, and a polymerizable vinylic monomer, such as acrylic acid; and polymerizing and grafting the monomer to the activated structure to form a polyvinylidene difluoride structure with a critical surface energy of at least about 80 dynes/cm.
    Type: Grant
    Filed: May 1, 1986
    Date of Patent: September 27, 1988
    Assignee: Pall Corporation
    Inventors: Irving B. Joffee, Peter J. Degen, Frederick A. Baltusis