Patents by Inventor David D. MacLaren

David D. MacLaren 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).

  • Pharmaceutical composition for combination of piperidinoalkanol-decongestant
    Patent number: 6039974
    Abstract: The present invention provides a pharmaceutical composition in the form of a bilayer tablet comprising,(a) a first discrete zone made with Formulation (A) which comprises, a therapeutically effective decongestant amount of a sympathomimetic drug, or a pharmaceutically acceptable salt thereof, in an amount of about 18% to about 39% by weight of Formulation (A), and a first carrier base material, the first carrier base material comprising a mixture of;(I) carnauba wax in an amount of about 59% to about 81% by weight of Formulation (A); and(ii) a suitable antiadherent in an amount of about 0.25% to about 2.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: March 21, 2000
    Assignee: Hoechst Marion Roussel, Inc.
    Inventors: David D. MacLaren, John R. Lefler, Sharon K. Minish
  • Controlled release formulation for pharmaceutical compounds
    Patent number: 5320853
    Abstract: Controlled release pharmaceutical beads are provided having a multi-layered core and a multi-layered periphery. The core contains at least (A) an inner portion having a suitable organic acid and (B) a sustainably-acid-releasing coating thereover. The periphery contains at least (A) an inner portion having a mixture of at least (i) a pharmaceutical compound and (ii) a surface-active agent, and (B) a sustainably-drug-releasing exterior coating.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: June 14, 1994
    Assignee: Merrell Dow Pharmaceuticals Inc.
    Inventors: Kazuo Noda, Yoshiyuki Hirakawa, Hiroyuki Yoshino, David D. MacLaren, Paul F. Skultety, John R. Lefler, Greg M. Beck