Method and apparatus for making helically wound extrudate particles
CA 1323872 C · Owner: Bambrick, William Edward · Inventors: Bambrick, William Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extrusion die useful for forming helical extrudate particles of inorganic oxide materials is made, by molding the die around pins having helical outer surface to form extrusion holes in the die. Helical walls of the extrusion holes are formed by the helical shape of the pins. When the molded die is formed, the helical pins are unscrewed out of the helical holes in the die to avoid damage to the die.
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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
- Granted November 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 2, 2010.
- 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.