Patents by Inventor Clayton L. Ester

Clayton L. Ester 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: 4552155
    Abstract: A device for taking specimens for laboratory analysis, specimens being of a fluid type such as body liquids or may be liquids of a different source. The device comprises a hollow body member with a closed end and an open end. The closed end has orifice therethrough which orifice is eccentric with respect to the longitudinal axis of the body member. A plunger having a plunger tip means is inserted into the body member for the purpose of accurately varying the internal volume of the device. The closed end is provided with an exteriorly mounted closure which may be of a rotatable type or a sliding plate type. The closure contains an orifice which may be aligned with the orifice in the closed end to take specimens into the device and then the closure may be moved with reference to the body member to misalign the orifices so that the orifice in the body member is closed and the specimen cannot be ejected from the device.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: November 12, 1985
    Assignee: Transmed Corporation
    Inventors: Roger F. Etherington, Clayton L. Ester