Patents by Inventor Carl W. Schlapfer

Carl W. Schlapfer 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).

  • Process for removing metal ions from solution with a dipicolylamine chemically bound to the surface of a silicate
    Patent number: 5102640
    Abstract: Dipicolylamine (DPA) is chemically bound to the surface of a silicate, forming a solid phase particle without substantially decreasing the affinity constant of the DPA for certain ions. Then, the solid phase particle is contacted with the solution, thereby binding an ion to the particle. Subsequently the ion can be stripped from the ligand by treatment with a complexing agent or acid.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: April 7, 1992
    Inventor: Carl W. Schlapfer