Air preheater with semi-modular rotor construction
CA 2244099 C · Owner: Mattison, Glenn D. · Inventors: Wonderling, Michael W.; Cox, William C.; Snider, Rex R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The rotor (14) for a rotary regenerative air preheater is fabricated from a combination of shop assembled rotor sector modules (56) and field assembled components so as to eliminate the double plate diaphragms (34) of conventional modular rotors (14). The shop assembled modules (56) comprise one or more sectors (58, 60) and the field assembled components fit between the spaced shop assembled modules (56) spaced around the rotor hub (36). The support gratings (66) between the diaphragm plates (68) support modular heat exchange baskets (22) which are loaded into the rotor (14) radially from the periphery.
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 February 14, 1997 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 14, 2019.
- 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.