Patents Assigned to Calgon Vestal, Inc.
  • Process of preparing a topical antimicrobial cleanser
    Patent number: 5906808
    Abstract: The combination of chlorhexidine gluconate (CHG), SDA-3 ethyl alcohol and cetyl lactate has produced a highly effective topical antimicrobial cleanser having immediate, persistant and residual bactericidal activity. The invention also relates to a low temperature manufacturing process for producing chlorhexidine salts in alcohol based formulations.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: May 25, 1999
    Assignee: Calgon Vestal, Inc.
    Inventors: David W. Osborne, Fred Kirchner
  • Stainless steel alkali treatment
    Patent number: 5858118
    Abstract: The invention includes a method for cleaning and passivating a stainless steel surface comprising:1) contacting the surface with 15-45 ml/liter of a composition consisting essentially of between about 15 and 50% alkaline component, between about 1 to 15% chelant, and between about 35 to 84% water;2) maintaining contact to dislodge and remove residue from the surface;3) continuing contact to complex free iron ions liberated from the surface with the chelant to form an oxide film on the surface; and4) continuing contact to precipitate the complexed ions into the oxide film.The compositions may further include a surfactant selected from the group consisting of anionic, cationic, nonionic and zwitterionic surfactants to enhance cleaning performance.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: January 12, 1999
    Assignee: Calgon Vestal, Inc.
    Inventors: Sadiq Shah, Fred Kirchner
  • Topical antimicrobial cleanser containing chlorhexidine gluconate and alcohol
    Patent number: 5776430
    Abstract: The combination of chlorhexidine gluconate (CHG), SDA-3 ethyl alcohol and cetyl lactate has produced a highly effective topical antimicrobial cleanser having immediate, persistant and residual bactericidal activity. The invention also relates to a low temperature manufacturing process for producing chlorhexidine salts in alcohol based formulations.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: July 7, 1998
    Assignee: Calgon Vestal, Inc.
    Inventors: David W. Osborne, Fred Kirchner
  • Stainless steel acid treatment
    Patent number: 5766684
    Abstract: The invention includes a method for cleaning and passivating a stainless steel surface comprising:1) contacting the surface with 1548 ml/liter of an acid formulation comprising between about 1 and 60% acid component, about 1-15% surfactant, and between about 39 and 98% water;2) maintaining contact to dislodge and remove residue from the surface;3) continuing contact to complex free iron ions liberated from the surface to form an oxide film on the surface; and4) continuing contact to precipitate the complexed ions into the oxide film.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: June 16, 1998
    Assignee: Calgon Vestal, Inc.
    Inventors: Sadiq Shah, Fred Kirchner