Skid-resistant pavement markings
CA 1315586 C · Owner: Laird, James A. · Inventors: Laird, James A.; Haenggi, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A skid-resistant pavement marking sheet including a top surface and a plurality of skid-resistant ceramic spheroids embedded in and protruding from the surface. The ceramic spheroids are fired from a raw material mixture including 10-97 wt. % mineral particulates, 3-90 wt. % alumina and, at least 1 wt. % binder, at a temperature of about 1300°C, have an outer surface rich in alumina concentration relative to the center of the spheroid and are resistant to crushing and fracturing.
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 April 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 2010.
- 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.