Detection of malignant and premalignant conditions
CA 2120129 A1 · Owner: Slater, Trevor F. (Deceased) · Inventors: Jonas, Sonja Karin; Slater, Trevor F. (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of testing for a malignant or pre-malignant condition of the cervix by examination of a cervical cell sample in which, the test is performed on a fraction of the sample consisting predominantly of epithelial cells, which have been separated by a buoyant density method such as a discontinuous density gradient centrifugation. Following separation of the epithelial cells the cells are tested for an abnormal level of an enzyme associated with proliferating cells. Typically, the enzyme tested for is one selected from the group consisting of pentose phosphate shunt enzymes ornithine decarboxylase, thymidine kinase and ribonucleotide, reductase, e.g. glucose-6-phosphate dehydrogenase …
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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 September 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 25, 2014.
- 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.