Piling
CA 1283552 C · Owner: Hong, Lee Pee · Inventors: Hong, Lee Pee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reinforced pre-cast concrete pile includes an intermediate cast-in plate 5' attached to cast-in reinforcements 3, 9, 9' of the pile. Following driving of a column of the piles, if the plate 5' of the uppermost pile is above a reference terrain level then the upwardly projecting part is cut off and that part severed at the lower face of its plate 5' and such upper half is re-used in a subsequent column of piles
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 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 30, 2008.
- 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.