Fiber optic diffusers and method for manufacture of the same
CA 2028757 C · Owner: Health Research Inc. · Inventors: Potter, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to improvements on fiberoptic diffusers for use in PDT and methods of making the same. This invention discloses a fiberoptic cylindrical diffuser dispersing light outwardly in a cylindrical scattering pattern which includes a fiber with a jacket-stripped core tip, a thin layer of scattering medium coated on the bare core tip, and a sleeve member with a closed end enclosing the fiber tip without touching the scattering medium and fixed on the jacket of the fiber. The sleeve member may include a tapered head. The present invention also discloses a fiberoptic spherical diffuser radiating light outwardly in a spherical scattering pattern. The spherical diffuser …
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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 29, 1990 and granted April 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 2012.
- 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.