Patents by Inventor Darwin B. Long

Darwin B. Long 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).

  • Method of making configured lead bushing for batteries
    Patent number: 5704119
    Abstract: A method of making a configured lead bushing comprising the steps of die casting a one-piece cup-shaped member having cylindrical side walls and a disk extending across the cup-shaped member and then cutting away the disk from the cup-shaped member to leave an annular lead bushing having an interior surface and an exterior surface which is followed by cutting away portions of the exterior surface to form an outside shoulder and a set of acid rings and cutting away portions of the interior surface to form an interior shoulder on the annular lead bushing.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: January 6, 1998
    Inventors: Robert W. Ratte, Darwin B. Long