Freestanding plastic container for pressurized fluids
CA 2117800 C · Owner: Collette, Wayne N. · Inventors: Krishnakumar, Suppayan M.; Collette, Wayne N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A freestanding container base having an improved combination of properties in regard to creep resistance stress crack, resistance, impact strength weight, standing stability and formability. The container base (18) has a substantially hemispherical bottom wall (21) which includes four radiating ribs (26) and four legs (22) extending downwardkly from the bottom wall between the ribs and each of which terminates in a foot (24). Each rib has a rib wall forming part of the substantially hemispherical bottom wall and having an angular extent of from about 15° to about 30° for enhanced strength with the leg occupying the remaining, 75° to 60° angular extent for enhanced formability. The outer …
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 7, 1993 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2015.
- 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.