Novel polymerized crystalline colloidal array sensors
CA 2270346 A1 · Owner: Asher, Sanford A. · Inventors: Asher, Sanford A.; Holtz, John H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel sensor devices composed of a crystalline colloidal array (CCA) polymerized in a hydrogel are disclosed. The hydrogels are characterized as being capable of shrinking and swelling in response to specific stimuli applied thereto. As the hydrogels shrink or swell the lattice structure of , the CCA embedded therein changes thereby changing the wavelength of light diffracted by the CCA. Thus by monitoring the change in diffracted wavelength the concentration of a stimulus is determined. The gels can be modified to sense numerous different stimuli. The sensor devices are specific in that they are modified to react with only one species or family of species. These sensors have various …
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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 24, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2019.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.