Method for recycling used or contaminated lubricating oils
CA 2095564 A1 · Owner: Digilio, Virgulino Antonio · Inventors: Digilio, Virgulino Antonio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention refers to a novel method for recycling used or contaminated lubricating oils, more particularly to a method that distinguishes when compared to the commonly used techniques not only due to its novelty but also because it Provides great advantages with respect to: Processing development through a smaller number of steps and considerably reducing the processing time; improving the residual products, since it eliminates the acid waste and provides a reuseable final product: and particularly with respect to economic and ecological results particularly due to the great benefits the present method will bring to the planet s ecosystem. Generally speaking, the method …
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 May 5, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2015.
- 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.