Method and apparatus for drying particulates
CA 2298912 C · Owner: Newpark Drilling Fluids Canada, Inc. · Inventors: Merkley, Robert E.; Lincz, Ron O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method and apparatus is provided for reducing the amount of liquid discard in, drill cuttings separated from the drilling fluid the apparatus including a , first separator for removing larger cuttings from the drilling fluid the cuttings having some , remaining fluid associated therewith, a centrifugal separator for removing the majority of the remaining fluid, from the cuttings, additional centrifuges for removing fine cuttings from the drilling fluid, malting the fluid suitable for reuse in drilling operations and a collection point for cuttings, from the centrifugal separators.
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 February 17, 2000 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2022.
- 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.