Master ring
CA 2249159 A1 · Owner: Feroz, Syed Hasan Niaz · Inventors: Feroz, Syed Hasan Niaz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ring is able to make different sizes without cutting or stretching the shank of a ring. It is necessary to have moveable joints in the shank and secure enough not to move without very heavy pressure. Ends of shank are connected separately on four sliding tubes which slide in pairs on two , sliding, bars. Two screws are used to hold the sliding bars secure on desired place and also able to change the shank of the ring to a desired size. This process is done by turning the two screws clockwise or anti-clockwise.
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 September 4, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 4, 2020.
- 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.