Patents by Inventor Maurice Laderoute

Maurice Laderoute 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).

  • Limited use hypodermic syringe
    Patent number: 5230707
    Abstract: A hypodermic syringe which can be filled with liquid medication for injection into a subject only from a container of the liquid under pressure greater than the ambient pressure around the syringe includes a moveable piston in a cylinder and an injection needle extending from one end of the cylinder defining a liquid dosage space between the piston and the needle and on the other side of the piston in the cylinder is a piston stem that extends from the other end of the cylinder and is manipulated by the user to inject a liquid from the dosage space under the force of the piston out of the needle, the piston and the piston stem being adapted so that the stem can be manipulated to push the piston toward the needle, but the stem cannot be manipulated to pull the piston away from the needle, and the position of the stem in the cylinder can be adjusted at any of a plurality of positions that limit the travel of the piston away from the needle and so limit the volume of the liquid dosage space defined between the p
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: July 27, 1993
    Inventor: Maurice Laderoute
  • Limited use hypodermic syringe
    Patent number: 4946441
    Abstract: A hypodermic syringe which can be filled with liquid medication for injection into a subject only from a container of the liquid under pressure greater than the ambient pressure around the syringe includes a moveable piston in a cylinder and an injection needle extending from one end of the cylinder defining a liquid dosage space between the piston and the needle and on the other side of the piston in the cylinder is a piston stem that extends from the other end of the cylinder and is manipulated by the user to inject a liquid from the dosage space under the force of the piston out of the needle, the piston and the piston stem being adapted so that the stem can be manipulated to push the piston toward the needle, but the stem cannot be manipulated to pull the piston away from the needle, and the position of the stem in the cylinder can be adjusted at any of a plurality of positions that limit the travel of the piston away from the needle and so limit the volume of the liquid dosage space defined between the p
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: August 7, 1990
    Inventor: Maurice Laderoute