Patents by Inventor Ann M. Cognetti

Ann M. Cognetti 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 of forming corrosion inhibiting films with hydrogenated benzotriazole derivatives
    Patent number: 5874026
    Abstract: A method of use of a composition including either or both isomers of hydrogenated methylbenzotriazole, namely, 5-Methyl-1H-Benzotriazole or 4-Methyl-1H-Benzotriazole which have been at least about 50% hydrogenated, to form corrosion inhibiting films on metal surfaces in an aqueous environment. The hydrogenated methylbenzotriazole compositions provide both improved passivation and improved film persistence when charged to aqueous industrial systems either on a continuous or on an intermittent basis. Continuous dosing is generally kept at a constant >0.5, typically 1-2 ppm in the aqueous system to be treated; intermittent doses are generally 10-20 ppm once every week or two or more.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: February 23, 1999
    Assignee: Calgon Corporation
    Inventors: John P. Pilsits, Jr., Ann M. Cognetti, Jasbir S. Gill