Oil sorbent
CA 2095151 C · Owner: Smith, Michael David · Inventors: Smith, Stephen Robert; Groves, Mark William; Smith, Michael David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an oil sorbent comprising a matrix of intermingled non-woven polyolefin fibres shredded, polyolefin film and cellulosic fibres. In preferred embodiments the cellulosic fibres are wood pulp fibres the polyolefin fibres, are polypropylene fibres and the polyolefin film is polyethylene film. The invention also provides a process for the sorption of oil comprising the steps of contacting the oil with a sorbent said sorbent comprising a matrix of intermingled non-woven polyolefin fibres, shredded polyolefin film and cellulosic fibres. The oil sorbent is useful for recovery of oil especially hydrocarbon oil, from, oil spillages especially spillages into water.
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 October 29, 1991 and granted June 23, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 2013.
- 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.