Drum or pail closure
CA 1265075 C · Owner: Rheem Australia Limited · Inventors: Duffy, Douglas Charles; Temby, Richard Douglas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
DRUM OR PAIL CLOSURE", The formation of an outwardly extending curl as the upper rim of a pail or drum having a cylindrical wall by roling the peripheral edge through greater than 360° relative to the cylindrical wall forms a strong curl able to support a leak proof seal formed by gasket during dangerous goods drop tasting. When used with a lug-cover lid, the lugs may be clenched beneath the curl through a re-entrant portion enhancing the security of the seal. Methods of forming the curl and an improved lug configuration are also described and claimed.
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 January 30, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 2007.
- 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.