Batteries with tester label
CA 2058728 C · Owner: Bailey, Jean W. · Inventors: Tucholski, Gary R.; Bailey, Jean W.; Huhndorff, Harry R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a battery (64) having a label (1) and a tester therefor, the tester forming part of the label (1) and comprising a circuit (10) whose ends (12 15) contact or are, contactable with the terminals (66 70) of the battery. A, portion of the circuit (10) between the two ends (12 15), provide an area of predetermined resistance (14) and an indicator (19) is associated with the area of resistance and is activatable thereby by a current flowing therethrough activation of the indicator (19) giving an indication of the remaining power in the battery. The circuit (10) consists of an electrically conductive material having two ends (12 15), connected to each other via the area of …
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 January 3, 1992 and granted November 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 3, 2014.
- 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.