An April 2000 editorial column by Robert L. Park and an outside query by an unknown person prompted Group Director Esther Kepplinger of the USPTO to review this new patent herself. Kepplinger said that her "main concern was the proposition that the applicant was claiming the electron going to a lower orbital in a fashion that I knew was contrary to the known laws of physics and chemistry", and that the patent appeared to involve cold fusion and perpetual motion. Kepplinger contacted another Director, Robert Spar, who also expressed doubts on the patentability of the patent application. This caused the USPTO to withdraw from issue the patent application before it was granted and re-open it for review, and to withdraw four related applications, including one for a hydrino power plant.