Interlocking liner for a casting shake-out unit
CA 2208227 C · Owner: Didion Manufacturing Company · Inventors: Didion, Michael S.; Didion, Charles J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A casting shake-out unit (1) has an outer cylinder (3) and an inner cylinder (5). The inner cylinder is made of a plurality of interfitting segments (9) which interlock and cooperate with each other to prevent a segment (9) from falling out of the completed inner cylinder (5). Each segment includes tongues (35) extending from opposing edges of the segment's body (11) and pockets (45) formed in the body. The pockets (45) of one segment (9A) receive at least a part of the tongue (35) of a neighboring segment (9B 9C).
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 December 14, 1995 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2017.
- 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.