Package water tube boiler having two offset drums
CA 2500586 C · Owner: English, John R. · Inventors: English, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A package water tube boiler (10) has offset upper (22) and lower (20) steam and water drums located adjacent its opposite side walls (12 14), with a , generally square combustion chamber (36) between the drums. Connecting the drums are generally L-shaped riser and downcomer tubes including convection tubes (28) and radiant tubes (24) extending in vertical and horizontal runs along the sides, top and bottom of the combustion chamber. The tubes especially the inboard radiant tubes (24) are configured, and their entrances , and exits to and from the drums are located so as to permit increased , efficiency and steam generation capacity without increasing the package boiler's outside …
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 November 6, 2003 and granted March 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2025.
- 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.