Blow molded drum
CA 2312865 A1 · Owner: Entegris, Inc. · Inventors: Rauworth, Barry L.; Hennen, John M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plastic blow molded drum (24) has unique top (30) and bottom (34) structure providing protection and strength for the drum (24) and attachments. An integrally formed top structure (30) with a sufficiently deep recess (46) provides protection for drum inserts and associated closures. Additionally the bottom structure (34) includes a sump (130) and structural member (168) formed by the pinched-off parisan during the blow molding process. The drum (24) has a top wall (44), a cylindrical side wall (26) and a bottom wall (58) , defining an open interior. The protective recess (46) may suitably be formed by the chime (40) and/or further downward recessed portions (46) of the top wall …
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 1, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 1, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 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.