Sleeve molding
CA 2226230 C · Owner: Collette, Wayne N. · Inventors: Krishnakumar, Suppayan M.; Collette, Wayne N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sleeve molding apparatus and methods for making multilayer injection molded plastic articles in successive mold cavities. In a first molding step an , inner sleeve is molded on a core in a first mold cavity which may comprise a , full body length sleeve or only a partial sleeve such as an upper neck finish , portion. The sleeve and core are withdrawn from the first mold cavity while the sleeve is still warm, and transferred without substantial delay to a second mold cavity for injection molding an outer layer which bonds to the inner sleeve. By transferring the sleeve at an elevated temperature into the second mold cavity, an improved bond is formed between the inner sleeve and outer …
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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 8, 1996 and granted October 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2018.
- 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.