Patents Assigned to Custom Research and Development
  • Metal oxide remover for stainless steels
    Patent number: 4470920
    Abstract: A composition for removing metal oxides from stainless steel is disclosed. The composition is an aqueous solution of nitric acid, sulfamic acid and a chelating agent selected from a group comprising amino acids and hydroxy acids. The solution should be applied at an elevated temperature.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: September 11, 1984
    Assignee: Custom Research and Development
    Inventor: Newton G. Leveskis
  • Metal oxide remover containing a strong mineral acid, chelating agent and a basic ammonia derivative
    Patent number: 4250048
    Abstract: Composition and method for removing metal oxides from ferrous metals. The composition contains an ammonia derivative such as an amine, a strong mineral acid and an organic chelating agent for the metal oxides in an aqueous solution having an acidic pH of about 0.5-3.0. Metal oxides are most readily removed by applying the solution at elevated temperature.
    Type: Grant
    Filed: July 3, 1979
    Date of Patent: February 10, 1981
    Assignee: Custom Research and Development
    Inventor: Newton G. Leveskis
  • Metal oxide remover containing a strong mineral acid, citric acid and a basic ammonia derivative
    Patent number: 4174290
    Abstract: Composition and method for removing metal oxides from ferrous metals. The composition contains an ammonia derivative such as an amine, a strong mineral acid and citric acid in an aqueous solution having an acidic pH of about 0.5-3.0. Metal oxides are removed by applying the solution at elevated temperature.
    Type: Grant
    Filed: September 30, 1977
    Date of Patent: November 13, 1979
    Assignee: Custom Research and Development
    Inventor: Newton G. Leveskis