Integrated optic star coupler
CA 2011470 C · Owner: United Technologies Corporation · Inventors: Leonberger, Frederick J.; Suchoski, Paul G. Jr.; Findakly, Talal K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical power star coupler includes a LiNbO3 or LiTaO3 substrate having a major surface for receiving a circuit array of one or more 1 x 2 splitters disposed thereon by a two step proton exchange (TSPE) process, in a geometric pattern to provide an N x M star coupler having high polarization extinction, uniform splitting ratio and low, loss.
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 March 5, 1990 and granted April 22, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 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.