The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2008
Filed:
Dec. 05, 2003
Young Kweon Choi, Seoul, KR;
Hyun Suk Yu, Gunpo-si, KR;
Jae Soon Ahn, Seoul, KR;
Hee Sook Kim, Seoul, KR;
Hyun Woo Kim, Gunpo-si, KR;
Young Kweon Choi, Seoul, KR;
Hyun Suk Yu, Gunpo-si, KR;
Jae Soon Ahn, Seoul, KR;
Hee Sook Kim, Seoul, KR;
Hyun Woo Kim, Gunpo-si, KR;
Icure Pharmaceutical Corp., Seoul, KR;
Abstract
The patch for tooth whitening of the present invention includes a tooth-adhering layer () containing erodible polymer complexes formed by hydrogen bonding of a polymer with a carboxyl group (—COOH) and a polymer with a carbonyl group (—C═O) or ether group (—O—) and a tooth whitening agent; and an erosion rate-controlling layer () containing a mixture of a hydrophilic polymer and a film-forming polymer, wherein the patch is in a film form and is characterized by being eroded until extinguished after releasing the tooth whitening agent. When applied to the teeth, the patch releases a peroxide tooth-whitening agent while being hydrated by water in the mouth during a prescribed period, and thereafter, eroded until extinguished, thereby not requiring an additional detaching work from the teeth. Therefore, the patch is convenient in use and greatly reduces an obstruction sensation. Moreover, the patch has an excellent whitening effect.