Patents by Inventor Robert J. Pallo

Robert J. Pallo 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 for reducing filtrate waste in a manufacturing process of a pharmaceutical product containing benzalkonium chloride
    Patent number: 5550163
    Abstract: A method for reducing filtrate waste in a manufacturing process of a pharmaceutical product containing benzalkonium chloride as a preservative generally includes the steps of mixing the non-benzalkonium chloride components with benzalkonium chloride to formulate the product and thereafter sterilizing the product by passing same through a microfiltration membrane. In processes in which the product has a time dependent benzalkonium chloride content due to benzalkonium chloride adsorption on a microfiltration membrane, an amount of benzalkonium chloride wasted can be reduced by maintaining a selected temperature of the microfiltration membrane and the product therein.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: August 27, 1996
    Assignee: Allergan, Inc.
    Inventors: Shulin Ding, Robert J. Pallo, Walter L. Tien, Orest Olejnik