Patents by Inventor Howard N. E. Stevens

Howard N. E. Stevens 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).

  • Dispensing device
    Patent number: 5474784
    Abstract: A controlled release device useful especially as an oral dosage form for man comprises a water impermeable capsule having at least one orifice which orifice is closed by a water swellable or water dispersable plug. Preferably the capsule is a cylinder formed e.g. of polyethylene closed at one end. The open end is closed by a tablet formed e.g. by direct compression of a pharmaceutical excipient such as lactose.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: December 12, 1995
    Assignee: British Technology Group Limited
    Inventors: Howard N. E. Stevens, Abdul Rashid, Massoud Bakhshaee
  • Dispensing device
    Patent number: 5342624
    Abstract: Novel devices for the controlled release of active materials especially pharmaceutical are formed from at least two interpenetrating pieces. The male piece is water swellable and swells to disengage the female piece. The female piece is preferably formed from a thermoplastic, e.g. LDPE or from a soluble material such as gelatin which is rendered impermeable by an external coating of a hydrophobic material such as PVC. The devices find particular application as oral dosage forms for use in man.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: August 30, 1994
    Assignee: British Technology Group Ltd.
    Inventors: Marion E. McNeill, Abdul Rashid, Howard N. E. Stevens