Patents Assigned to Chemed Corporation
  • Composition and method of flocculating mineral solids colloidally suspended in an aqueous medium
    Patent number: 4012354
    Abstract: This invention provides an improved composition and method for dispersing high molecular weight polymers and copolymers used as flocculants for water and waste treatment by using, in combination with the polymer, a nonionic surfactant to retard polymer solubility, soda ash, a chelant, and a filler.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: March 15, 1977
    Assignee: Chemed Corporation
    Inventor: Stewart N. Paul
  • Composition and method for dispersing high molecular weight flocculant polymers in water
    Patent number: 4010135
    Abstract: This invention provides an improved composition and method for dispersing high molecular weight flocculant polymers and copolymers used for water and waste treatment by the combination of the polymer with an inert additive and a bonding agent.
    Type: Grant
    Filed: September 3, 1975
    Date of Patent: March 1, 1977
    Assignee: Chemed Corporation
    Inventor: Thomas R. Tutein
  • Method and composition of inhibiting scale
    Patent number: 3959167
    Abstract: The invention disclosed relates to a method for using a new improved composition for inhibiting or preventing accumulation of scale or the like on heating surfaces in an aqueous system. The present composition includes an acrylic polymer, a water-soluble chelant, and an organophosphonic acid and/or their water-soluble salts. In a preferred embodiment, the composition is composed of sodium polymethylacrylate, nitrilotriacetic acid and hydroxyethylidene diphosphonic acid as its water-soluble salts.
    Type: Grant
    Filed: December 10, 1973
    Date of Patent: May 25, 1976
    Assignee: Chemed Corporation
    Inventors: Chih Ming Hwa, Dionisio Guerrero Cuisia, Murrell Leon Salutsky
  • Disinfectant composition and method
    Patent number: 3954646
    Abstract: The invention disclosed provides new improved liquid detergent-germicide compositions and a method of using same. Generally, anti-microbially active alpha-halogenated fatty acid is combined with an anionic surface active agent and a monobasic and/or hydroxy monobasic organic acid. In a preferred embodiment, the anti-microbially active alpha-halogenated fatty acid is an alpha-brominated fatty acid.
    Type: Grant
    Filed: May 7, 1974
    Date of Patent: May 4, 1976
    Assignee: Chemed Corporation
    Inventors: Norman Ellison Dewar, Said Ibrahim Raziq
  • Method and composition for inhibiting corrosion in aqueous systems
    Patent number: 3935125
    Abstract: The invention disclosed relates to a method and composition for inhibiting corrosion in aqueous systems, the composition including a mixture of amine pyrophosphate, an organophosphonate, and a triazole. The composition provides a non-polluting corrosion inhibitive system which is especially useful in aqueous units constructed of ferrous and non-ferrous metals.
    Type: Grant
    Filed: June 25, 1974
    Date of Patent: January 27, 1976
    Assignee: Chemed Corporation
    Inventor: Jose T. Jacob