Asphalt road resurfacing machine
CA 2002058 A1 · Owner: Lee, Chin-Po · Inventors: Lee, Chin-Po; Lee, Chin-Po
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An asphalt road resurfacing machine includes a heater to soften asphalt pavement by heat a plurality of, scraper assemblies to excavate asphalt pavement knock, excavated asphalt pavement to pieces and mix the pieces evenly, a shaving device to shave the mixed pieces on the road, and a roller to crush and smooth the excavated asphalt pavement to a renovated condition.
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 November 2, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 2, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2011.
- 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.