Collapsible dispensing container having improved barrier headpiece
CA 1282926 C · Owner: Szafranski, Richard M. · Inventors: Szafranski, Richard M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A collapsible dispensing container or tube having a deformable body and a thermoplastic headpiece welded to the body. The headpiece is formed by injection molding an admixture of 20-87.5 percent of polyethylene and/or ethylene/vinyl acetate copolymer 5-40 percent of, at least one of polyamide ethylene/vinyl alcohol copoly-, mer, polyvinyl alcohol and polyester and 7.5-40 percent, of an alkylcarboxyl-substituted polyolefin. In the injection molding, the admixture is heated to a temperature above the melting point of all components of the admixture under conditions that minimize admixing of the admixture and the resultant heterogeneous molten mixture is then injected into a mold. The …
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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
- Granted April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2008.
- 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.