Coated refractory article and method
CA 2044060 A1 · Owner: Macdowell, John F. · Inventors: Macdowell, John F.; Andrus, Ronald L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For protection against oxidation or other adverse chemical deterioration, substrates such as carbon inter-, metallic aluminides, and refractory metal alloys are provided with barrier coatings of an aluminoborate glassceramic coating having a composition, in weight percent of, about 10-55% Al2O3, 4-40% B2O3, up to 70% total of RO wherein RO consists of one or more alkaline earth metal oxides selected in amounts not exceeding the indicated proportions from the group consisting of up to 70% BaO up, to 60% SrO, up to 40% CaO, and up to 25% MgO up to 35%, total of R2O, wherein R2O consists of one or more alkali metal oxides selected in amounts not exceeding the indicated proportion from the …
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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 June 6, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 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.