Partially crystalline, transitional aluminum oxides, methods for their synthesis and use for obtaining molded articles, which consist essentially of gamma al2o3
CA 2070607 C · Owner: Bollmann, Ulrich · Inventors: Engels, Siegfried; Feige, Reinhard; Bollmann, Ulrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a partially crystalline transitional aluminum oxide containing 4-fold and 5-fold coordinated aluminum oxide in a ratio of at least 1:2. The invention also relates to a method of making this composition. The composition is particularly useful as starting material for manufacturing highly reactive molded articles. Accordingly, the invention also relates to this manufacturing process.
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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 5, 1992 and granted May 11, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2014.
- 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
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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.