Dual path profilograph
CA 2284377 A1 · Owner: Paveset America, Llc · Inventors: Marvel, Fredrick J.; Fleming, Colin T.; Rybak, Zbigniew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for measuring two parallel spaced surface profiles is disclosed. The apparatus disclosed has dual laterally spaced beams linked to a transport device shown as a trailer that is towable by a motor vehicle. Each beam has a profiling wheel that measures road surface deviations and transmits the resulting measurements to a recording device. The beams are foldable and stowable on the trailer for transport of the apparatus between measuring sites.
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 October 1, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 1, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 2021.
- 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.