Highly reflective biogratings and method
CA 2081776 A1 · Owner: Adeza Biomedical Corporation · Inventors: Gustafson, Eric K.; Tsay, Yuh-Geng; Lee, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reflective biograting consists of an optically flat layer of a transparent composition such as silicon dioxide having a first and second surface, spatially periodic zones of active and inactive binding agent on the first surface, and a reflective metal layer having a thickness sufficient to prevent transmission of substantially all light therethrough. The reflective metal layer can be supported on an optically flat surface of metal wafer and the, reflective metal can be aluminum silver, gold, chromium, nickel, titanium or platinum coating on a polished wafer. Preferably the , silicon dioxide layer is formed either by direct sputtering of silicon dioxide or by coating an alkali metal …
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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 May 16, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 16, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 16, 2013.
- 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.