Closure
CA 1104521 A · Owner: Phillips Petroleum Company · Inventors: Eddy, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CLOSURE, Abstract of the Disclosure, A two-piece closure with a skirt portion surmounted by an upstanding flange having integral extended parts at least in the shape of an inverted U and a disc portion having an at least upward projection at the disc's periphery with this projection substantially confined between the integral extended parts of the upstanding flange portion. The upstanding flange portion confining the projection is swaged with an imprinted crimp design on its surfaces so that it is offset radially inwardly from the skirt portion to form a shoulder sufficiently wide to accommodate a duplicate skirt portion stacked thereon. In a preferred embodiment the integral extended part …
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 July 7, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 1998.
- 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.