Optical-electronic battery indicator
CA 2306147 A1 · Owner: Parker, Eric G. · Inventors: Parker, Eric G.; Nowak, David R.; Lindsay, Ryan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical-electronic device measuring a charge level in a battery having a housing positioned within an interior of the battery the housing , having a, cavity. A light source and a light receiving device are positioned within the cavity. A sensing surface and at least one reflecting surface are positioned within the cavity, between the light source and the light receiving device. A box is formed with respect, to the housing, the at least one reflecting surface dividing the box from the cavity. Light projected from the light source is transmitted from the sensing surface where, a portion of the light is refracted depending upon the charge level of the battery. The, remaining light 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 April 14, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 2022.
- 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.