Light-reflective road marker of self-cleaning type
CA 1105427 A · Owner: Traffic Standard, Incorporated · Inventors: Kone, Elliott H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Road marker in a road bed having at the road level a resilient diaphragm carrying a light-reflective lens yieldingly projecting above the road level and operationally depressible below the road level by an automotive wheel passing over the lens, with the diaphragm providing opposite wiper blades extending at the road level into contact with opposite faces of the lens and cleaning these faces on operational depression of the lens below and its recovery into project-, ion above the road level. -1-
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 July 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 1998.
- 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.