Vehicular access control device
CA 2175170 C · Owner: Scrimshaw, Laird Shaw Stephen · Inventors: Scrimshaw, Laird Shaw Stephen; Scrimshaw, Laird Shaw Stephen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ramped barrier is provided to control movement of motorized vehicles into designated areas. The ramped barrier can be mounted on a road parking lot, driveway or other surface. The barrier is provided with a series of parallel tines secured to a rotating shaft. The tines form a tire piercing barrier against unauthorized traffic. The shaft is housed within the barrier and adjacent to the top wall of the barrier. The tines when retracted, extend from the shaft to about the outer edge of one ramped side of the barrier. The tines can be positioned to project upwardly against vehicular traffic in one or two directions.
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 26, 1996 and granted March 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2018.
- 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.