Circular tool assembly
CA 2077756 C · Owner: Chezem, Jim A. · Inventors: Chezem, Jim A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A circular tool assembly (20) adapted to be fitted together and secured on a power-driven tool arbor (22) includes first and second circular discs (24, 30), the discs defining a medial arbor-receiving opening and peripheral portions. At least one of the discs (24) defines an outer concave surface (36) extending continuously between the medial opening and the peripheral portion (28), and the disc further defines an inner concave surface (38) extending continuously between the medial opening and the peripheral portion (28). The discs are adapted to be positioned on the arbor of the tool with a circular tool element (40) such as a, chain saw circlet, positioned between and engaged by the …
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 January 15, 1992 and granted June 7, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 2014.
- 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.