Patents by Inventor Neil Arthur Johnson

Neil Arthur Johnson 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).

  • Patent number: 4022198
    Abstract: An apparatus for nonsurgically removing certain IUDs, such as 7- or T-shaped IUDs, from within the uterus via the cervical canal. The apparatus is composed of: a rod-shaped handle; a tube, one end of which slidably fits over one end of the handle such that the handle may slide within the tube from a first position to a second position; a hole in the other end of the tube; and a filament that extends between and is attached to the other end of the handle and the other end of the tube via the hole. The filament is wrapped snugly about the other end of the tube when the handle is slid to its first position and the filament defines an outwardly extending loop when the handle is slid to its second position, which loop is used to entrap the IUD.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: May 10, 1977
    Assignee: Alza Corporation
    Inventor: Neil Arthur Johnson
  • Patent number: 3987790
    Abstract: An osmotically driven fluid dispenser that is capable of being miniaturized and used as an implant to administer fluid drug compositions to animals and humans. The dispenser comprises a flexible inner bag adapted to contain the drug composition, a fluid tight plug fitted into the bag opening, a port in the plug through which the composition may be charged to the bag, an intermediate layer of an osmotically effective solute composition partly covering the bag exterior such that a band of the bag exterior proximate to the plugged end is not covered by the layer, an outer shape-retaining semipermeable membrane covering the layer of solute and forming a fluid tight seal at said band, and a tube that fits snugly through the port in the plug and extends substantially into the interior of the bag after the drug composition is charged to the bag, said tube providing an outlet through which the drug composition may be dispensed.
    Type: Grant
    Filed: October 1, 1975
    Date of Patent: October 26, 1976
    Assignee: Alza Corporation
    Inventors: James Benjamin Eckenhoff, Neil Arthur Johnson, Su Il Yum