A method for preparing a shaft-unified resin rotator having a hollow part in the inside
CA 2199031 C · Owner: Asahi Kasei Kogyo Kabushiki Kaisha · Inventors: Kondo, Masaaki; Kubo, Kimihiro; Furuya, Norihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for hollow injection molding. More particularly, it concerns a method for hollow injection molding a shaft-unified type resin rotator with excellent productivity. The molded article obtained by the present invention is excellent in dimensional accuracy, strength, surface appearance and recyclability of materials.
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, 1995 and granted April 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 17, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 2017.
- 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.