Preparation of thin film ceramics by sol gel processing
CA 2065381 A1 · Owner: Warrender, Theresa E. · Inventors: Steward, Nigel I.; Teat, Simon J.; Groves, Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of making a mixed sol to produce a titanate-based or zirconate-based ceramic. A metal salt such as lead acetate is dissolved in a stabilising agent such as glacial acetic acid used in a, concentration such that subsequent addition of titanium and zirconium alkoxide sols is effected without precipitation. PZT ceramic films made from the mixed sols have: dielectric constant 150-4000; dielectric loss factor 0.001-0.08; saturation polarisation 0.8 µC/cm2.
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 April 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 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.