Device for transmitting heating or cooling medium to a substrate and an impingement type freezer containing the same
CA 2114080 C · Owner: Wittel, George · Inventors: Appolonia, John Jack; Wittel, George; Muscato, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for transmitting a heating or cooling medium to a moving substrate which includes at least one continuous channel traversing at least a major portion of the width of the moving substrate for converting a multidirectional flow of the heating or cooling medium into a unidirectional flow a device, for removing and/or preventing the presence of foreign matter within the channel, and ovens and freezers employing the same.
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 January 24, 1994 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 2016.
- 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.