Patents by Inventor Ferdinand P. Heller

Ferdinand P. Heller 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).

  • Method for producing an amorphous, light weight calcium phosphate coating on ferrous metal surfaces
    Patent number: 4108690
    Abstract: A method is disclosed for producing a non-crystalline, light weight tightly adherent coating of calcium phosphate on ferrous metal surfaces. In this method, the ferrous metal surface is treated with a coating solution containing calcium phosphate together with an oxidizing agent at a pH which closely approaches but does not exceed the saturation point of the calcium phosphate in solution. In practicing the method of this invention, the calcium phosphate content of the coating bath is preselected from the range of from about 0.01 to about 1.0 moles per liter as measured by the Ca.sup.++ cation. Next, a bath temperature of from about 50.degree. F. to about 160.degree. F. is selected. The pH of the bath is raised to a pH approaching but not exceeding the saturation point of calcium phosphate at the selected temperature and the bath is brought to the selected temperature.Coating of the ferrous metal with the calcium phosphate solution is accomplished by conventional dip or spray methods.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: August 22, 1978
    Assignee: Amchem Products, Inc.
    Inventor: Ferdinand P. Heller