Automobile parts and engine canisters
CA 2081161 C · Owner: Sakai, Kouichi · Inventors: Sakai, Kouichi; Hatayama, Toshio; Kojima, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Automobile parts comprising polybutylene naphthalenedicarboxylate, which are used at such portion(s) of an automobile that come to contact with a fuel, an oil, combustion gas, or the like are provided. Furthermore engine canister comprising the same, polymer as above is provided. These automobile parts or engine canisters exhibit excellent mechanical strength, heat resistance, dimensional precision chemical resistance, acid resistance, alkali resistance, and impermeability to gasoline and gasohol.
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 22, 1992 and granted September 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2014.
- 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.