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Details for Patent: 5,422,093

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Summary for Patent: 5,422,093

Title: Photochemotherapeutic method using 5-aminolevulinic acid and precursors thereof
Abstract:A method of detecting and treating malignant and non-malignant tissue abnormalities and lesions of the skin; conjunctiva; respiratory, digestive and vaginal mucosa; endometrium and urothelium; and for ablating the endometrial tissue and treating body fluids, including blood containing suspended abnormal cells, and for treating cancers of the nervous system in which 5-aminolevulinic acid or precursor thereof is administered to the patient in an amount sufficient to induce synthesis fluorescence and/or photosensitizing concentrations of a protoporphyrin IX in the abnormal cells, followed by exposure of the abnormal cells to light of photoactivating wavelengths.
Inventor(s): Kennedy; James C. (Kingston, CA), Pottier; Roy H. (Kingston, CA), Reid; Robert L. (Kingston, CA)
Assignee: Queen's University (Kington, CA)
Application Number:08/082,113
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International Patent Family for Patent: 5,422,093

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria287709► Subscribe
Australia3883293► Subscribe
Australia5888796► Subscribe
Australia6034390► Subscribe
Australia624985► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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