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Expired Canadian patentCanada

Non-invasive screening of skin diseases by visible/near-infrared spectroscopy

CA 2396883 C · Owner: Toole, John W. P. · Inventors: Mantsch, Henry H.; Mansfield, James R.; Toole, John W. P.

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Abstract From the Canadian patent

A non-invasive tool for skin disease diagnosis would be a useful clinical adjunct. The purpose of this study was to determine whether visible/near-infrared spectroscopy can be used to noninvasively characterize skin diseases. In-vivo visible- and near-infrared spectra (400-2500 nm) of skin neoplasms (actinic keratoses basal cell carcinomata, banal common acquired melanocytic nevi, dysplastic melanocytic nevi actinic lentigines and , seborrheic keratoses) were collected by placing a fiber optic probe on the skin. Paired t-tests, repeated measures analysis of variance and linear discriminant analysis were used to determine whether significant spectral differences existed and whether …

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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 October 5, 2000 and granted April 12, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2020.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2022.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 5, 2000
GrantedApril 12, 2011
Term endedOctober 5, 2020
Patent numberCA 2396883 C
Classification (IPC)A61B5/10

Timeline

Timeline From CIPO dates

2001200320052007200920112013201520172019Application filedOct 5, 2000Patent grantedApril 12, 2011Term endedOct 5, 2020

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.