Shale containment unit for a drilling rig
CA 2180929 C · Owner: Hertz, Joseph Dwayne · Inventors: Hertz, Joseph Dwayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shale containment unit for a drilling rig which includes a skid having a first side, a second side a first end, and a second end. An end wall extends entirely across the first end of the skid. A pair of parallel sidewalls extend from the first end of the skid at least partially along the first side and the second side. A floor is secured to the end wall and sidewalls. A liquid retaining dike transversely extends between the sidewalls. The dike has a top ridge with a first slope sloping downwardly toward the first end of the skid from the top ridge to the floor. A second slope slopes downwardly from the top ridge toward the second end of the skid.
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
- Filed July 10, 1996 and granted December 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2018.
- 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.