Insert pipe for injection molding, insert pipe processing method, and molded article
CA 2342936 A1 · Owner: Kato, Akira · Inventors: Kato, Akira; Ishii, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A number of holes (3) are formed in the outer circumferential wall (2) of a tubular metallic pipe (1) at regulator intervals in both circumferential and axial directions. Each of the holes (3) consists of a polygonal opening (4) and raised pieces (5) formed by bending the material of the outer circumferential wall (2) inwardly from the peripheral edge surrouding the opening (3). This pipe may be used as an insert pipe in injection molding an article such as a lead screw, an optical fiber ferrule or the like. The raised pieces reinforce the part of the pipe surrounding each hole and enhances the , bonding between the molding material and insert pipe.
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 July 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2021.
- 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.