Patents by Inventor Harold H. Christhilf

Harold H. Christhilf 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).

  • Patent number: 4729791
    Abstract: Coating compositions for metals effective to inhibit corrosion of ferrous and nonferrous metals susceptible to corrosion, said compositions comprising an inorganic-organic complex in the form of a thixotropic overbased alkaline earth metal sulfonate, particularly calcium, organic sulfonate, complexed with an alkaline earth metal, particularly calcium, carbonate; and linseed oil or a drying oil having drying properties generally similar to linseed oil, said linseed oil constituting at least 15% and, particularly, higher percentages up to about 50%, by weight of the coating compositions; and a drier, preferably of the paint drier type; and particularly advantageously also containing an epoxidized oil, particularly an epoxidized drying oil; and, also, such ingredients as mineral oils, waxes, petrolatums and resins.
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: March 8, 1988
    Assignee: Witco Corporation
    Inventors: Paul E. Laura, Paul W. Niemczura, Harold H. Christhilf, Paul E. Morrison
  • Patent number: 4631083
    Abstract: Pipe varnish compositions effective to inhibit corrosion of steel pipe over appreciable periods of time of storage of said steel pipe, said compositions comprising a thixotropic overbased calcium organic sulfonate calcium carbonate complex; and a drying oil such as linseed oils; a drier, preferably of the paint drier type, such as cobalt naphthenate, zirconium octoate and manganese salts or soaps, or mixtures thereof; and also containing at least one member of the group of epoxidized oils, polybutenes, and alkyd resins; and, optionally, such ingredients as waxes, petrolatums and resins.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: December 23, 1986
    Assignee: Witco Corporation
    Inventors: Harold H. Christhilf, Paul E. Morrison, Paul W. Niemczura