Method for producing heat-recoverable articles and apparatus for expanding/shrinking articles
CA 2105976 C · Owner: Delaware Capital Formation, Inc. · Inventors: Mcgaffigan, Thomas H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of producing a heat-recoverable plastic article such as a tube (1) by deforming the article from a heat-stable configuration (1a) to a heat-unstable configuration (1b). The heat-unstable configuration will return to the heat-stable configuration when the article is heated to above the heat recovery temperature. The article is heated such that the article is at a temperature no lower than the heat recovery temperature during the deforming step by lossy particles (2) dispersed in the article or in a tool (4) used in the deforming step. The lossy particles allow auto-regulated heating of the article since the particles cannot be heated beyond their Curie transition temperature …
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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 April 24, 1992 and granted October 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 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.