Patents Assigned to Passamaquoddy Tribe, A Sovereign Indian tribe recognized by the Government of The United States of America
  • Method for simultaneously scrubbing cement kiln exhaust gas and producing useful by-products therefrom
    Patent number: 4716027
    Abstract: This invention relates to an apparatus and method for simultaneously scrubbing acidic exhaust gases and removing metal salts from alkaline waste dust from a cement plant or the like thereby producing useful products from what would otherwise be wasted. In essence the two wastes are combined in water and the resulting solution and precipitate separated in a tank. The solution is useful both to cool incoming waste gas and as a fertilizer, whilst the precipitate is suitable as kiln feed stock.
    Type: Grant
    Filed: September 5, 1986
    Date of Patent: December 29, 1987
    Assignee: Passamaquoddy Tribe, A Sovereign Indian tribe recognized by the Government of The United States of America
    Inventor: Garrett L. Morrison
  • Method for simultaneously scrubbing cement kiln exhaust gas and producing useful by-products therefrom
    Patent number: RE33031
    Abstract: This invention relates to an apparatus and method for simultaneously scrubbing acidic exhaust gases and removing metal salts from alkaline waste dust from a cement plant or the like thereby producing useful products from what would otherwise be wasted. In essence the two wastes are combined in water and the resulting solution and precipitate separated in a tank. The solution is useful both to cool incoming waste gas and as a fertilizer, whilst the precipitate is suitable as kiln feed stock.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: August 22, 1989
    Assignee: Passamaquoddy Tribe, A Sovereign Indian tribe recognized by the Government of The United States of America
    Inventor: Garrett L. Morrison