Secondary battery
CA 1267932 C · Owner: Mccullough, Francis Patrick · Inventors: Levine, Charles Arthur; Snelgrove, Roy Vernon; Mccullough, Francis Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention resides in an improved secondary rechargeable battery which comprises a substantially hermetically sealed housing having at least two and preferably three or more cells electrically connected in series. Each cell contains at least a pair of electrodes. At least one of said pair of electrodes is a commonly shared, unitary electrode which extends, between a pair of adjacent cells. The commonly shared electrode is constructed of a single material and of a size sufficient to form an electrically effective electrode in each of said adjacent cell thus forming a, positive electrode in one cell and a negative electrode in the adjacent cell. 33,311-F
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 April 17, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 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.