Work roll for for use in rolling apparatus
CA 2326331 A1 · Owner: Showa Denko K.K. · Inventors: Tamura, Takashi; Inaba, Norikazu; Kobayashi, Keigo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A work roll used for a rolling device capable of manufacturing from a metal , plate material, modified cross section products comprising for example, a , plate-like part and a plurality of rise walls formed integrally with one surface of the plate-like part at intervals provided between them such as for , example, members forming a flat heat exchanging pipe a heat sink, and a lead , frame, whereby a manufacturing work is simpler and a finished surface is more accurate than those in a conventional work roll wherein a plurality of types , of discs (20A 20B, 21A, 21B) of different diameters are stacked alternately one by one on a same axis and fixed to each other large diameter discs (20A, …
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
- Filed March 29, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 2021.
- 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.