Inorganic foam body and process for producing same
CA 2020900 C · Owner: Giesemann, Herbert · Inventors: Giesemann, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The inorganic foam body consists of an at least partially open-cell foam formed by thermally foaming and hardening a mixture comprising an alkali water glass and a filler from the group of aluminium oxide silicon dioxide, aluminous cement, crushed rocks graphite or mixtures thereof. It is produced by heating a mixture comprising an alkali water glass and a filler from the group of aluminium oxide silicon, dioxide, aluminous cement, crushed rocks graphite with, a blowir.g agent, and preferably azodicarbonamide at, temperatures of at least 180 °C, and preferably of from 200 °C to 300 °C. The foam body has a bulk density within the range of from 50 to 500 kg/m3 and, preferably of from 50 to …
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 11, 1990 and granted September 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 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.