Scraper for liquid distribution pipes, especially for petroleum products
CA 2000885 C · Owner: Le Devehat, Eugene · Inventors: Le Devehat, Eugene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bidirectional scraper for liquid distribution pipes comprising an elongate body (4, 4') and two wear segments on either side of a thinner central portion with a concave external surface characterised in that the elongate body is formed by two complementary parts (5, 6; 5', 6') fastened together by a nut (7 7'), fastened to one of the parts and a bolt (8 8') engaged, in the other of the parts the wear segments being, removably mounted around a central portion (4B) of the body, axially between two end portions.
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 17, 1989 and granted November 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 17, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.