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Clifford C. Hach

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  • Ames, IA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Programmable chemical application system
    • Patent number 4,993,634
    • Issue date Feb 19, 1991
    • Hach Company
    • Clifford C. Hach
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    Programmable fertilizer application system
    • Patent number 4,878,614
    • Issue date Nov 7, 1989
    • Hach Company
    • Clifford C. Hach
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    System and method for quantitative analysis of a solution
    • Patent number 4,865,992
    • Issue date Sep 12, 1989
    • Hach Company
    • Clifford C. Hach
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Digestion process
    • Patent number 4,645,745
    • Issue date Feb 24, 1987
    • Hach Company
    • Clifford C. Hach
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Digestion process
    • Patent number 4,645,746
    • Issue date Feb 24, 1987
    • Hach Company
    • Clifford C. Hach
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Continuous pH meter
    • Patent number 4,288,308
    • Issue date Sep 8, 1981
    • Hach Chemical Company
    • Clifford C. Hach
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Conductivity probe for viscous liquids
    • Patent number 4,220,921
    • Issue date Sep 2, 1980
    • Hach Chemical Company
    • Clifford C. Hach
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Slurry pipet
    • Patent number 4,197,746
    • Issue date Apr 15, 1980
    • Hach Chemical Company
    • Clifford C. Hach
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Mechanical strainer
    • Patent number 4,177,148
    • Issue date Dec 4, 1979
    • Hach Chemical Company
    • Clifford C. Hach
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Digital titration device
    • Patent number 4,086,062
    • Issue date Apr 25, 1978
    • Hach Chemical Company
    • Clifford C. Hach
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Method and apparatus for sampling impure water
    • Patent number 4,053,282
    • Issue date Oct 11, 1977
    • Hach Chemical Company
    • Clifford C. Hach
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Carbon nitrogen test system
    • Patent number 4,025,309
    • Issue date May 24, 1977
    • Hach Chemical Company
    • Clifford C. Hach
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Method and apparatus for automatically analyzing fluids
    • Patent number 3,953,136
    • Issue date Apr 27, 1976
    • Hach Chemical Company
    • Clifford C. Hach
    • G01 - MEASURING TESTING