Patents by Inventor Stanley Lechtzin

Stanley Lechtzin 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: 4343684
    Abstract: The method of achieving a karat gold electroform includes the steps of forming an easily workable, substrate to a desired configuration and then applying an electrically conductive surface treatment if necessary. The configured, treated substrate is electroplated in a metallic bath until a self-supporting metallic shell is formed over the substrate. In known manner, the substrate is removed. The metallic shell is cleaned and then placed in a karat gold electroforming bath wherein a gold piece is built to the desired final thickness and karat by controlling current density and the plating time. The karat gold electroformed piece can be stress relieved by annealing at elevated temperatures for suitable periods of time and is then immersed in an acid bath to remove the metallic shell from the piece interior, thereby producing a configured shell of karat gold.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: August 10, 1982
    Inventor: Stanley Lechtzin