Bung screen
CA 2233697 A1 · Owner: Kay, Ken M. · Inventors: Kay, Ken M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus is used for removing solids from liquid material to be poured from a container, e.g. dried paint particles from paint to be poured from a paint, pail. The apparatus includes a lid that may be secured to the pail a bung , opening in, the lid and a screen assembly secured to the bottom of the lid and extending across, the bung opening to screen the solid materials from the paint. The preferred screen is, a double screen with a coarse outer screen and a finer inner screen. It is also, preferred that the lid be equipped with an air hole to facilitate pouring of the paint.
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 April 2, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 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.