Illuminated knob assembly
CA 2225979 C · Owner: Illinois Tool Works Inc. · Inventors: Pizzo, William C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The control knob includes a chamber into which a translucent polycarbonate jewel light pipe assembly of a first color such as, blue, and a translucent polycarbonate jewel cap of a second color, such as white, are inserted. The jewel cap is engaged against said jewel light pipe assembly and includes a bulbous portion which protrudes or stands proud through an axially oriented slot in the sidewalls of the control knob thereby forming an indicator for the control knob. In ambient illumination, such as during the day, the indicator appears to be the color of the jewel cap, such as white. However when the, dashboard is electrically illuminated such as during the night, the illumination 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 December 30, 1997 and granted February 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 30, 2019.
- 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.