Optical fibre feedthrough
CA 2079104 A1 · Owner: Bt&D Technologies Limited · Inventors: Payne, Roger A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical fibre feedthrough (2) in which a polarization maintaining (PM) fibre (6) is sealed within a metallic sleeve (14) by a glass seal (20). The seal (6) applies asymmetric stresses to the fibre (6) which is orientated so that they reinforce its PM properties. This arrangement reduces the manufacturing tolerances needed to avoid destroying the PM properties of the fibre associated with symmetric stress seals. It has application to packages for opto-electronic components. A double optical fibre feedthrough is also disclosed.
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 28, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 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.