Process of manufacturing a wall having an opening therein, and a door or cover therefor
CA 1080453 A · Owner: Ab Trelleborgplast · Inventors: Tornerefelt, Gosta T.I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure The invention relates to a process of manufacturing in one and the same operation, a wall or a wall section having an opening therein, and a door or cover for the opening the, door or cover being larger than the free opening in the wall or wall section. The two components are formed in a common tool the, components being placed in staggered parallel planes and interconnected by means of a connecting flange which is directed substantially transversely of these planes and extends between the surrounding edge portion of the wall opening and the surrounding edge portion of the door or cover. After forming, the two components are severed by cutting off of the …
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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 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 1, 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.