Tooth-bleaching compositions

  • US 6,536,628 B2
  • Filed: 10/31/2001
  • Issued: 03/25/2003
  • Est. Priority Date: 09/25/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A single exit multi compartment vessel with a mixer, whose compartments are adapted to keep apart two formulations and whose compartments respectively include:

  • a first formulation comprising a hydrogen peroxide precursor compound and an anhydrous carrier wherein the first formulation is substantially free of an alkaline pH adjusting agent; and

    a second formulation comprising an alkaline pH-adjusting agent and wherein the second formulation is substantially free of the hydrogen peroxide precursor compound;

    the first formulation or the second formulation including a thickener and whereby applying pressure to the vessel forces material from the compartments through the mixer to form a thickened, aqueous hydrogen peroxide containing mixture emerging from the single exit in the vessel, wherein the mixture has a pH of greater than 5.5.

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