V-belt
CA 2035261 C · Owner: Hamada, Takashi · Inventors: Nakajima, Masayoshi; Hamada, Takashi; Mishima, Kyoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
V-BELT, Abstract of the Disclosure, A power transmission belt having a length and a lateral extent. The belt consists of a tension layer and a compression layer with the compression layer defined at least partially by acrylonitrile-butadiene copolymer rubber (hydrogenated nitrite rubber), having at least an 80% hydrogen addition rate, and a plurality of substantially laterally oriented fibers in the acrylonitrile -butadiene copolymer rubber in the compression layer. The fibers are treated with one of resorcin-formalin-nitrile rubber latex (RFL) and resorcin-formalinhydrogenated nitrile rubber latex (RFL) having at least an 80% hydrogen addition rate.
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 January 30, 1991 and granted September 27, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 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.