Drip free opening
CA 2363039 A1 · Owner: Cao, Lidong · Inventors: Cao, Lidong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Drip Free Opening comprises a sidewall a base and a spout. The sidewall, surrounds the base and the spout. The base slopes down from the sidewall to the spout and supports them. There is a draining hole in the lowest position of the base, or there is draining chink through the spout at the lowest position of the base. Accumulation of liquid staying inside of the sidewall can flow to the lowest position of the base and pass through the draining hole or draining chink to drop back into container. At the end of pouring the, rim of the spout cuts the flow, and a small amount of liquid leaks from the spout and flow down into the space between the sidewall and the spout then, drops back into …
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 November 4, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 4, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 4, 2023.
- 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.