Grid for a battery plate, method of producing the same, and battery using the same
CA 2391043 C · Owner: Gs Yuasa International Ltd. · Inventors: Fujiwara, Yoshiomi; Sawai, Ken
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A grid for a battery plate is described in which a large number of slits each configured by a cut elongating in a longitudinal direction are formed in a metal sheet in a zigzag pattern, said metal sheet is stretched in a width direction to develop said slits and nodes configured between slits that are adjacent in the longitudinal direction are connected to one another to form a lattice-like shape, by four wires which are configured between slits that are adjacent in the width direction, and which are obliquely bent to be drawn out, wherein at least one of said four wires connected to each of said nodes is bent in a predetermined oblique direction via a drawn-out portion which is …
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 June 20, 2002 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2024.
- 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.