Pressing of whiteware ceramic articles
CA 2022663 C · Owner: Croft, Alan P. · Inventors: Croft, Alan P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of whiteware ceramic articles employs an alkylenediamine such as, ethylenediamine, as an additive to increase the green strength of articles prepared by pressing. Optionally the additive includes a latex such as a styrene butadiene latex in an amount effective to further improve the green strength of the articles prepared. Unlike conventional additives such as polyglycols the, additives of the present invention are effective at low dosages and would not result in ceramic articles with undesirably altered characteristics.
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 August 3, 1990 and granted September 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 3, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 3, 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.