Patents by Inventor Calvin M. Johnston

Calvin M. Johnston 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: 4504994
    Abstract: An apparatus for cleaning conventional contact lenses with a suitable cleansing preparation including a body formed of a soft, slightly abrasive material and having a recessed area formed therein for receiving a contact lens. A handle assembly includes a projecting portion of the same or a similar soft, slightly abrasive material which can be inserted in the recess to engage the lens and manipulate it to be rubbed on its inward and outward surfaces by the surface of the body recess and the surface of the handle projecting portion. The cleaning operation is carried out by first applying the cleaning preparation to the concave recessed surface of the body and to the convex projecting portion of the handle assembly, placing the lens in the recessed area 22 and inserting the projecting portion of the handle assembly therein and manipulating the lens against the surfaces to apply the cleaning preparation to the lens.
    Type: Grant
    Filed: January 5, 1984
    Date of Patent: March 19, 1985
    Inventor: Calvin M. Johnston