Multilayer analytical elements for use in the assay of cholesterol
CA 1056282 A · Owner: Eastman Kodak Company · Inventors: Underwood, Gary M.; Goodhue, Charles T.; Risley, Hugh A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An analytical element for use in the quantitative assay of complex fluids for cholesterol content comprising a support a reagent layer comprising a substance having cholesterol oxidase activity dispersed in a suitable binder coated on one side of the support, and a porous medium comprised of one or more layers which serve to spread the sample in a manner providing a substantially constant volume of sample per unit area to the reagent layer in spite of variation in the volume of sample applied to the element coated over the reagent layer. According to a preferred embodiment, the reagent layer also contains an indicator system which reacts with one or more products of the cholesterol oxidase …
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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
- Granted June 12, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 1996.
- 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.