Method for absorbing liquids, especially oil
CA 2046683 A1 · Owner: Bustamante, Michael R. · Inventors: Magley, Donald A.; Bustamante, Michael R.; Renaker, John J. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is described for the absorption of a liquid in which one applies to a body of the liquid an absorbent material which contains dealginated, partially dewatered kelp residue. Other components, such as perlite may also be, present. The absorbent material will have a water content no greater than about 25%, preferably about 5%-10%. The absorbent material may be formed into a wide variety of shapes, including pellets, boards, blocks granules, flakes, and the like, and in such forms may be applied in a variety of different manners to the liquid to be absorbed. The method is useful in the absorption of many types of liquids but most, importantly oil products. (PATRBUST91.F05)
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, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 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.