Compositions and methods for softening, thinning and removing hyperkeratotic tissue
CA 2488505 A1 · Owner: Buck, Carol J. · Inventors: Buck, Carol J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel compositions and methods for treatment of hyperkeratotic mammalian tissue are disclosed employing proteolytic enzymes originally developed for the hydrolysis of food-related proteins and currently commonly used as food grade meat tenderizers and flavor enhancers. The compositions containing these proteinases soften, thin and exfoliate hyperkeratotic formations on the skin including calluses, corns, dry, scaling/flaking skin and keratoses without harming surrounding tissue by selective lysing of hyperkeratotic tissue. Such enzymes accomplish this by lysing only the 10-end peptide bonds of keratin protein, the dominant protein component of hyperkeratotic skin.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 10, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 10, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.