Inorganic fibres
CA 2196532 C · Owner: The Morgan Crucible Company Plc · Inventors: Jubb, Gary Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Inorganic fibres are disclosed, vacuum preforms of which have a shrinkage of 3.5 % or less when exposed to 1260 ~C for 24 hours. The fibres have a composition comprising SrO, Al2O3, and sufficient fibre forming additive to allow fibre formation but not so much as to increase shrinkage beyond 3.5 %. A preferred range of fibres has a shrinkage of 3.5 % or less when exposed to 1500 ~C for 24 hours and may comprise (in weight percent): SrO 53.2 %-57.6 % Al2O3 30.4-40.1 %, SiO2 5.06-10.1 %.
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 July 31, 1995 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2017.
- 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.