Fluorescence assay apparatus
CA 2073344 C · Owner: Block, Myron J. · Inventors: Lackie, Steve J.; Block, Myron J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for use with a totally internally reflecting fiber-optic fluorescent assay apparatus (20) overcomes the problems of discriminating against internally generated fluorescence-arising in polymeric fibers. The system includes a disc (50) that can be moved to alternately block and unblock a central colinear conical portion of an input cone of excitation radiation directed into an input end (28) of the fiber (30) thereby periodically, varying the numerical aperture at the sensing region of the fiber surface. By analyzing the signal values received when that numerical aperture is relatively high with respect to those received when that numerical aperture is relatively low, one can …
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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 November 8, 1991 and granted August 21, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 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.