Method of producing contaminant restraining booms and the like
CA 1256294 A · Owner: Expandi Systems Ab · Inventors: Oberg, Per O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed of producing a contaminant restraining boom, comprising an expandable buoyant body divided into chambers formed by joining together side members and distributed along the boom. The side members are provided with chamber partitioning walls formed by partition members each fastened transversely to the respective side member along a partition member edge having a length substantially equal to the width of the side member. The edges fastened to the respective side members are opposed to leach other and in register. Thereafter the opposed partition members are mutually attached along their free edges, and the side members are tightly joined together along their outer edges …
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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 June 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 27, 2006.
- 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.