Details for Patent: 6,709,446
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Summary for Patent: 6,709,446
| Title: | Illuminator for photodynamic therapy and diagnosis which produces substantially uniform intensity visible light |
| Abstract: | An apparatus and method for photodynamic therapy or photodynamic diagnosis using an illuminator comprising a plurality of light sources generally conforming to a contoured surface and irradiating the contoured surface with substantially uniform intensity visible light. The light sources may comprise generally U-shaped fluorescent tubes that are driven by electronic ballasts. Adjustment of the ballast voltage controls the output power of the tubes. The tubes are supported by a sheet-metal or plastic housing and are covered by a polycarbonate shield which directs cooling airflow within the unit and prevents glass-patient contact in the event of tube breakage. An aluminum reflector located behind the tubes increases both the output irradiance and the uniformity of the output distribution. The spacing of the U-shaped tubes is varied to increase the output at the edges of the illuminator to make the output more uniform. Also, different portions of the tubes are cooled at different amounts, to improve uniformity. A light sensor monitors output from the U-shaped tubes to provide a signal for adjusting the output from the tubes. |
| Inventor(s): | Lundahl; Scott (Lexington, MA), Kozodoy; Rebecca (Randolph, MA), Carroll; Ronald (Hingham, MA), Leppelmeier; Elton (Highland Height, OH) |
| Assignee: | Dusa Pharmaceuticals, Inc. (Toronto, CA) |
| Application Number: | 09/774,084 |
| Patent Litigation and PTAB cases: | See patent lawsuits and PTAB cases for patent 6,709,446 |
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Patent Claim Types: see list of patent claims | Use; |
Drugs Protected by US Patent 6,709,446
| Applicant | Tradename | Generic Name | Dosage | NDA | Approval Date | TE | Type | RLD | RS | Patent No. | Patent Expiration | Product | Substance | Delist Req. | Patented / Exclusive Use | Submissiondate |
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International Family Members for US Patent 6,709,446
| Country | Patent Number | Estimated Expiration | Supplementary Protection Certificate | SPC Country | SPC Expiration |
|---|---|---|---|---|---|
| Argentina | 015054 | ⤷ Try a Trial | |||
| Austria | 285817 | ⤷ Try a Trial | |||
| Austria | 423598 | ⤷ Try a Trial | |||
| Australia | 3858699 | ⤷ Try a Trial | |||
| Australia | 753997 | ⤷ Try a Trial | |||
| Brazil | 9911781 | ⤷ Try a Trial | |||
| Canada | 2331090 | ⤷ Try a Trial | |||
| >Country | >Patent Number | >Estimated Expiration | >Supplementary Protection Certificate | >SPC Country | >SPC Expiration |
