Patents Assigned to Clearspark, LLC
  • Method for preparing a pyrotechnic composition and charge
    Patent number: 8845833
    Abstract: The invention is directed to a method for preparing a pyrotechnic composition, to the use of a water-soluble cellulose ether binder, to a pyrotechnic composition, to a method for preparing a pyrotechnic charge, and to a pyrotechnic charge. The method of the invention comprises mixing the fibrous nitrocellulose in wet form with the one or more water-soluble cellulose ether binders and optionally one or more solvents, wherein the amount of organic solvent in the mixture is 10 wt. % or less based on total weight of the mixture.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: September 30, 2014
    Assignee: Clearspark, LLC
    Inventors: Martijn Zebregs, Murk Pieter van Rooijen, Rutger Webb
  • Low-smoke pyrotechnic composition for producing colored flames
    Patent number: 8486207
    Abstract: The present invention provides a chlorine-containing pyrotechnic composition which is substantially free of per-chlorate which composition comprises a nitrocellulose which is derived from a fibrous nitrocellulose starting material that has at least partially been dissolved during the process of preparing the pyrotechnic composition, and a colorant. The invention further provides a firework article comprising said pyrotechnic composition, and a method for preparing the same.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: July 16, 2013
    Assignee: Clearspark, LLC
    Inventors: Rutger Webb, Martijn Zebregs, John Franciscus Zevenbergen, Murk Pieter Van Rooijen
  • Combustion chamber for launching fireworks projectiles
    Patent number: 8402893
    Abstract: The invention provides a combustion chamber (3) for launching a fireworks projectile which comprises a container (4) having top wall, bottom and side walls, wherein the top wall which comprises venting holes (1). The invention further provides a launching system', a method for launching a fireworks projectile, and a kit of parts comprising the combustion chamber (3) or launching system in accordance with the present invention and a propellant charge (7) for use in the combustion chamber (3).
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: March 26, 2013
    Assignee: Clearspark, LLC
    Inventors: Murk Pieter Van Rooijen, Rutger Webb
  • METHOD FOR PREPARING A PYROTECHNIC COMPOSITION AND CHARGE
    Publication number: 20130025748
    Abstract: The invention is directed to a method for preparing a pyrotechnic composition, to the use of a water-soluble cellulose ether binder, to a pyrotechnic composition, to a method for preparing a pyrotechnic charge, and to a pyrotechnic charge. The method of the invention comprises mixing the fibrous nitrocellulose in wet form with the one or more water-soluble cellulose ether binders and optionally one or more solvents, wherein the amount of organic solvent in the mixture is 10 wt. % or less based on total weight of the mixture.
    Type: Application
    Filed: January 19, 2011
    Publication date: January 31, 2013
    Applicant: CLEARSPARK, LLC
    Inventors: Martijn Zebregs, Murk Pieter Van Rooijen, Rutger Webb
  • Pyrotechnic colour composition
    Patent number: 8142581
    Abstract: The invention provides a chlorine-containing pyrotechnic composition which comprises a binder, an oxidator, a pyrotechnic fuel, and a colorant comprising a metal salt of 5-aminotetrazole. The invention further relates to a firework article comprising such a pyrotechnic composition. In addition, the invention provides a method for preparing said colorant.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: March 27, 2012
    Assignee: Clearspark, LLC
    Inventors: John Franciscus Zevenbergen, Rutger Webb, Murk Pieter Van Rooijen