Trench duct and cover assembly
CA 1237374 A · Owner: Midland-Ross Corporation · Inventors: Higgins, Robert G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A subfloor electrical trench duct includes an elongated U-shaped body supported by adjustable support members and has an access cover. The cover is supported by one leg of each of a pair of identical oppositely, disposed L-shaped channels extending axially of the body. A first leg of each channel has a predetermined width such that it will extend to a position substantially flush with the outer surface of the cover when the cover is supported by the second leg. The second leg, in turn, has a predetermined width such that it extends a predetermined distance above the cover when the cover is supported by the first leg for accommodating placement of carpet or tile on the cover. Each channel …
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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.