Patents by Inventor Kenneth B. Matthews

Kenneth B. Matthews 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 processing waste materials
    Patent number: 4741776
    Abstract: A method of processing waste material comprises treating the material with flue dust and bonding it to form a solid mass with cement powder, e.g. Portland cement. Acidic liquors containing heavy metals can be processed. Suitable flue dust is obtained from cement manufacture.
    Type: Grant
    Filed: July 30, 1985
    Date of Patent: May 3, 1988
    Assignee: Blue Circle Industries Limited
    Inventors: Gerald C. Bye, Kenneth B. Matthews
  • Compositions comprising mineral particles in suspension and method of treating aqueous systems therewith
    Patent number: 4711727
    Abstract: An aqueous slurry of mineral particles, for example calcium carbonate and/or calcium hydroxide, has a mineral solids concentration of at least 40% m/m and contains an agent that maintains the slurry at a pumpable viscosity but that acts as a flocculant upon dilution of the slurry. Suitable agents include cationic and amphoteric polyelectrolytes having nitrogen-containing groups, for example polyamines and dimethyl diallyl ammonium chloride polymers. The slurries may contain other components, for example a synthetic hectorite or a dispersing agent such as a polyacrylate, polymethacrylate or polyphosphate. The slurries are useful in papermaking and in the treatment of sewage.
    Type: Grant
    Filed: July 29, 1986
    Date of Patent: December 8, 1987
    Assignee: Blue Circle Industries, PLC
    Inventors: Kenneth B. Matthews, Christine A. Beckett, David E. Smith, Richard R. Davidson
  • Compositions comprising mineral particles in suspension and method of treating aqueous systems therewith
    Patent number: 4610801
    Abstract: An aqueous slurry of mineral particles, for example calcium carbonate and/or calcium hydroxide, has a mineral solids concentration of at least 40% m/m and contains an agent that maintains the slurry at a pumpable viscosity but that acts as a flocculant upon dilution of the slurry. Suitable agents include cationic and amphoteric polyelectrolytes having nitrogen-containing groups, for example polyamines and dimethyl diallyl ammonium chloride polymers. The slurries may contain other components for example a synthetic hectorite or a dispersing agent such as a polyacrylate, polymethacrylate or polyphosphate. The slurries are useful in papermaking and in the treatment of sewage.
    Type: Grant
    Filed: October 22, 1985
    Date of Patent: September 9, 1986
    Assignee: Blue Circle Industries PLC
    Inventors: Kenneth B. Matthews, Christine A. Beckett, David E. Smith, Richard R. Davidson
  • Cigarette making machines
    Patent number: 4305409
    Abstract: A cigarette making machine includes at least one transfer wheel for transferring the filler stream onto the wrapper web, and air guide vanes extending in approximately tangential directions towards the transfer wheel. As a result, the vanes arrest any particles of tobacco which fly off the wheel, and air streams induced by the suction in the wheel tend to return the particles to the wheel with a forward component of motion.
    Type: Grant
    Filed: July 25, 1979
    Date of Patent: December 15, 1981
    Assignee: Molins Limited
    Inventors: Derek H. Dyett, Kenneth B. Matthews, Jan A. Rakowicz