Patents by Inventor Pierre Priester

Pierre Priester 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: 4294629
    Abstract: A process and article of manufacture relating to drawn rods made of lead brass which has been subjected to at least one intermediate annealing treatment, the invention involves annealing at a temperature of between 425.degree. C. and a temperature which is 10.degree. lower than the solidus point for a period of between 1/100 of a second and one minute. The rods thus obtained contain uncoalesced lead particles having a dimension of less than 1.5 micrometers and contain at least 8000 of these lead particles per square millimeter and for each percent of lead. The rods produce fine shavings during machining and do not cause blocking on breakage. The present lead brass rods are particularly useful for automatic screw thread cutting.
    Type: Grant
    Filed: October 2, 1979
    Date of Patent: October 13, 1981
    Assignee: Trefimetaux
    Inventors: Adam Szyszkowski, Marc Moreau, Pierre Priester