Method of using thermally reversible material to form ceramic molds
CA 2269469 A1 · Owner: Tobin, James Robert · Inventors: Tobin, James Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for forming a ceramic mold comprises the step of placing a pattern (1) having critical pattern surfaces (13) in a flask (3) having an open end. The critical pattern surfaces (13) face upward toward the open end. Successive steps include adding a concentrated heat reversible gel solution (5) to the flask to cover the critical pattern surfaces (13) and cooling the gel , solution to form an elastic solid gel mold (7). The gel mold (7) has critical gel mold surfaces inverse to the critical pattern surfaces. Further steps include removing the pattern from the elastic gel mold casting a ceramic mold , (11) around the gel mold and liquifying the gel mold to remove it 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 October 9, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 2019.
- 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.