Material for thermal compensation and optical communication device using the material
CA 2363696 A1 · Owner: Sakamoto, Akihiko · Inventors: Matano, Takahiro; Sakamoto, Akihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A material for temperature compensation consists of a sinter produced by baking any of crystalline powder, crystallized glass powder and partially , crystalline glass powder. The sinter has a negative coefficient of thermal expansion and contains anisotropic crystals in terms of thermal expansion.
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 February 9, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 9, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2022.
- 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.