Chain guard
CA 2272198 A1 · Owner: Colistro, Vincent A. · Inventors: Colistro, Vincent A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chain guard is used on a rotary mower to prevent objects from being thrown out from under the mower. The chain guard includes adjacent strands of chain forming a curtain. The adjacent strands are linked by cross links spaced along, the chains to form a chain net which is more effective at trapping up thrown objects, than the unlinked chains.
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 May 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2021.
- 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.