Drum with bung
CA 2075806 C · Owner: Burgdorf, Marten · Inventors: Przytulla, Dietmar; Burgdorf, Marten
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a bung barrel made from thermoplastic synthetic material having an upper carrying and transporting ring and a bung hole socket located in a sunk-in bung hole housing in the edge region of the upper end a segmental-shaped, surface portion or a slope (10) being provided in the upper end (12) on both sides of the bung hole socket (16) for emptying residue from the bung barrel in a slightly tilted inverted disposition which, segmental-shaped surface portion or slope runs in a flush manner into the lower lying plane of the bung hole housing floor (20).
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 December 21, 1990 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2012.
- 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.