Optical waveguide with flexible tips
CA 2184900 C · Owner: Doiron, Daniel R. · Inventors: Doiron, Daniel R.; Narciso, Hugh L. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flexible tip (10) for a medical catheter suitable for the transmission of light and dimensionned to pass through extremely small tubular members is described. The flexible tip, preferably made of optically transparent silicone elastomer (13) is af-, fixed to the terminal end of a conventional optical fiber. In a preferred embodiment, the flexible tip comprises a central silicone core (11) surrounded by a cladding (12) having an index of refraction less than that of the core (11), permitting internal reflection. The flexible tip is provided with an outer jacket (13) which serves two purposes: (1) it provides structural integrity for the tip; and (2) it reinforces the union between the …
Read the whole patent
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 7, 1993 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2015.
- 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.