Patents by Inventor Dennis Y. Leong

Dennis Y. Leong 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).

  • Blasting explosive with improved water resistance
    Patent number: 4889570
    Abstract: A blasting explosive having improved water resistance comprises a particulate blend of from about 5 to about 27 wt. % of a slurry explosive and from about 73 to about 95 wt. % of a mixture of ammonium nitrate particles and a liquid hydrocarbon fuel based on the weight of the slurry, the ammonium nitrate particles and the fuel. The mixture of ammonium nitrate particles and a liquid hydrocarbon fuel contain from about 3.0 to about 6.0 wt. % hydrocarbon fuel based on the weight of the ammonium nitrate/fuel mixture. The blend is first coated with a gelling agent and subsequently coated with an anticaking agent.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: December 26, 1989
    Assignee: ETI Explosives Technologies International (Canada), Ltd.
    Inventor: Dennis Y. Leong