Patches for teeth whitening

  • US 6,689,344 B2
  • Filed: 09/13/2002
  • Issued: 02/10/2004
  • Est. Priority Date: 03/17/2000
  • Status: Active Grant
First Claim
Patent Images

1. A dry type patch for tooth whitening comprising an adhesive layer on a backing layer, wherein the adhesive layer contains a peroxide as a tooth whitening agent and a peroxide-compatible hydrophilic glass polymer as a base polymer, whereby the adhesive layer has little or no adhesion strength in a dry state and provides a strong adhesion to teeth while releasing the tooth whitening agent when hydrated on the enamel layers of teeth.

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