Overfill protection device
CA 2204460 A1 · Owner: Home, William · Inventors: Home, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A overfill protection device includes a first tubular body having an axial through hole with a larger diameter at one end thereof and a smaller diameter at another end thereof thus forming a shoulder portion therebetween a, second tubular body including an upper portion having a cylindrical recess open at an upper end thereof and provided with internal threads engaged with a lower threaded end of the first tubular body an intermediate, portion having a smaller diameter than the upper portion and having a plurality of radial holes a neck portion, between the upper and intermediate portions and a lower, portion having a smaller diameter than the intermediate portion, a cylindrical piston …
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 5, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2019.
- 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.