Reserve battery
CA 1315841 C · Owner: Thiess, George H. · Inventors: Thiess, George H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RESERVE BATTERY", Abstract, A replaceable low-cost reserve battery is easily activated by twisting a knob. Charging is accomplished inside the vehicle through use of the cigar lighter circuit. A hook is provided to both lock the activating knob and support the reserve battery during the changing process, which will take approximately 10 minutes. Means to regulate and visually indicate the delivery of current is provided to prevent excessive current from blowing the fuse in the cigar lighter circuit.
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 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 2010.
- 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.