Multiple heat source grid assembly
CA 2175986 C · Owner: Illinois Tool Works Inc. · Inventors: Zook, Jon C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for the melting of solid and quasi-solid materials such as, thermoplastics and hot melt adhesives is disclosed. The grid type melter includes one or more heating fins and melt spaces. Multiple heating elements lying in separate planes are disposed in the heating fins and the base in a manner which results in a relatively even temperature distribution along heating surfaces. Degradation of melted material is avoided and material flow rate is improved due to even heat transfer to the material.
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 May 7, 1996 and granted April 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 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.