Patents by Inventor Donald J. Witt

Donald J. Witt 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: 4810652
    Abstract: A harvester is provided for mechanically removing cells from the internal surfaces of conventional, unmodified roller bottles. The device is a foldable, flexible arrangment which may be inserted into the neck openings of conventional roller bottles, without any, or only minor, modification thereof. Once inserted, the device of the invention mechanically expands to engage the internal surface of the bottle for the scraping thereof as the bottle revolves, thus effectively removing the cell growth rapidly and without the tedium of laborious hand scraping.
    Type: Grant
    Filed: January 13, 1988
    Date of Patent: March 7, 1989
    Assignee: Becton, Dickinson and Company
    Inventor: Donald J. Witt