Protective pipe covering
CA 1163545 A · Owner: Kennedy, Ted, Jr. · Inventors: Kennedy, Ted, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for protecting irregular surface contour portions of articles such as underground conduits, comprising a hot or cold applied coating covered with a multi-ply plastic strip. The laminations of the plastic strip are made of a material such as polyvinylidene chloride, polypropylene, polyethylene, and polyvinyl. The strip has the characteristic of "deadfold" that, is when folded or crumpled, it tends to retain that condition with no appreciable spring-back.
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 March 13, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 2001.
- 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.