Closure means
CA 1088278 A · Owner: Tioxide Group Limited · Inventors: Haigh, Harold E.; Hofmann, Dietrich A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CLOSURE MEANS" A pressure vessel base closure means including a pair of flat disc-like members spaced apart by a peripheral outer cylindrical member and an inner perforated cylincrical member and there being provided between the two flat disc-like members a plurality of radially directed ribs to provide regidity to the base closure means. The base closure means is particularly useful for a reactor in which a bed of fluidised solid is maintained by the passage of a gas into the reactor through the base via the chamber between the two flat disc-like members.
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
- Granted October 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 1997.
- 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.