Utility usage rate monitor
CA 2443987 A1 · Owner: Halliwell, Ross · Inventors: Gladwin, Paul; Halliwell, Ross
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A utility usage rate monitor that allows a utility consumer to monitor their current rate of consumption of a utility service. The monitor can display the rate of consumption in a form that has particular relevance to the consumer such as the cost or rate of expenditure on the utility or a greenhouse gas emission reduction rate. The monitor has a transducer (1) that senses the rate that the utility is being supplied to the consumer. The transducer produces a signal and sends it to a remotely located consumer interface (15) via a transmission link (16). An awareness of the expenditure or greenhouse gas emission associated with the current levels of consumption of the utility can …
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 12, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 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.