Maintainable expansion joint for highways, bridges, and the like
CA 1305345 C · Owner: Brown, Howard R. · Inventors: Brown, Howard R.; Lanham, Roy J.; Arps, David H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An expansion joint for use between spaced apart ends of adjacent sections of a highway, bridge or the like the, expansion joint having a pair of aligned boxes embedded in the pavement material of the ends of the sections one or, more support rails each of which is slidingly supported at its opposed ends in the aligned boxes, and one or more intermediate rails between the spaced apart ends and extending transversely of the support rails each of the, intermediate rails being affixed to and supported thereby. Each of the boxes has a removable top plate whose top surface is coplanar with the driving surface of the highway bridge or the like, the top surface having a steel plate with upper and …
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, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 2009.
- 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.