Patents by Inventor Pieter Spek

Pieter Spek 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: 6893683
    Abstract: The invention comprises a process for the preparation of a coating, adhesive, film or sheet. In this process a mixture of a polyisocyanate functional, a polyepoxide functional, a polyanhydride functional or a polyketone functional compound or polymer and a compound containing reactive hydrogen, in which the compound containing reactive hydrogen is used in a material which is non-reactive towards the compound containing reactive hydrogen which mixture is not or low reactive at ambient conditions and high reactive under selected conditions, is applied onto a substrate at ambient temperature, followed by reacting the above compounds at elevated temperatures. At ambient temperature said compound containing reactive hydrogen is a solid material, a powder, a granule, a flake or grind or a mixture thereof which is preferably ground.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: May 17, 2005
    Assignee: Stahl International B.V.
    Inventors: Laurentius Cornelius Josephus Hesselmans, Dirk Pieter Spek
  • Patent number: PP26088
    Abstract: A new cultivar of Ilex aquifolium, ‘Spek 02’, that is characterized by its variegated foliage with deep green centers and golden yellow margins, its deep purple-red young shoots, its good winter hardiness, and its ability to be readily propagated by softwood stem cuttings.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: November 17, 2015
    Assignee: JOH. SPEK BOOMKWEKERIJEN B.V.
    Inventor: Pieter Spek