Manual relief gas vent
CA 1287339 C · Owner: W.R. Grace & Co.-Conn. · Inventors: Edson, Steven Scott
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A manually operated vent valve assembly for a bung hole in a drum lid. The low profile valve assembly is inserted into the bung hole and the lid sealed. The drum is vented by opening a valve stem in the assembly. The vented gas leaves through a gas outlet which is recessed in a reservoir within the valve assembly. By filling the reservoir with fluid, the venting gas can be observed as bubbles.
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 August 6, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2008.
- 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.