Method for depolluting fresh water- and salt water bodies from crude oil, petroleum products and their derivatives
CA 1098461 A · Owner: Snamprogetti S.P.A. · Inventors: Robertiello, Andrea; Degen, Ludwig; Olivieri, Roberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with an improved method for depolluting fresh and sea water bodies from crude oil petroleum products and their derivatives by spreading onto the water bodies compounds which contain phosphorus and slow-release nitrogen in a form which can be assimilated by aquatic microorganisms capable of metabolizing hydrocarbons. The improvement comprises using as the phosphorus source a compound selected from the group consisting of phosphatides both of synthetic, origin and occurring in natural products and phosphates, and using as the slow-release nitrogen source a compound selected formthe group consisting of hydantoins amides, allophanates, polyamines, acylureas esters of …
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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 March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 1998.
- 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
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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.