Thermally insulated distributed light network from a central light source
CA 2109282 C · Owner: Hughes Electronics Corporation · Inventors: Yen, Huan-Wun; Hsu, Tsung-Yuan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermally insulated distributed light network employs an array of discrete, thermally insulative light guides (4) that are spaced slightly away from a central light source (6) and provide optical coupling to optical fibers (10) that have a lower thermal capability. The light guides can either be solid such as quartz focusing, lenses (24), or a combination of the two. The light receiving ends of the light guides are preferably held by a specially designed coupler (2) so that the guides do not diverge from each other by more than the fibers' optical acceptance angle. The light guides are shaped so that their adjacent edges (22b,22c,22d) touch and form an enclosure around the light source, …
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 26, 1993 and granted May 27, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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.