Cold isopressing method
CA 2422997 A1 · Owner: Callahan, Shawn W. · Inventors: Callahan, Shawn W.; Apte, Prasad S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cold isopressing method in which first and second layers of at least two layers (16, 22; 38, 40; 38, 46; 38, 52) are formed within an isopressing mold (1, 2) and the second of the layers (22; 40; 46; 52) is isostatically pressed against the first of the layers (16; 38; 46) to compact the second layer (22; 40; 46; 52). The layers (16; 22; 38, 40) can be formed from different materials, for instance granular materials or slurries. Each layer (52) can additionally have different levels of materials (54 56, 58). The granular , materials can have pore formers to produce intermediate porous layers. Channels forming materials (50) can be positioned between layers (38 46) , during …
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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 September 14, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 14, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2023.
- 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.