Patents by Inventor Denis Windle

Denis Windle 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).

  • Treatment of underwater surfaces
    Patent number: 4183757
    Abstract: Surfaces intended for underwater use, e.g. ships hulls, are coated with wax as an aqueous dispersion. The dispersion may contain 15-75% wax, and have a viscosity of 1.5 to 75 Engler at 20.degree. C., giving coatings of 5-500 micrometers thick. The dispersion may be formed by emulsifying molten wax and water in the presence of 0.2 to 10% wt of an agent and cooling the emulsion. Anionic emulsifying agents are preferred and preferably water is added to wax. The average wax particle size in the dispersion may be from 0.05 to 10 micrometers.
    Type: Grant
    Filed: March 8, 1978
    Date of Patent: January 15, 1980
    Assignee: The British Petroleum Company Limited
    Inventors: Aleksander J. Groszek, Colin W. Parkes, Denis Windle