Lightweight cooling tower with cruciform columns
CA 2011909 C · Owner: Bac-Pritchard, Inc. · Inventors: Bardo, Charles J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A structural column has a generally cruciform cross section. The column includes a generally rectangular core section formed by four orthogonally related walls and four flange portions. Each flange portion is provided by a pair of spaced-apart parallel flanges which are extensions of a pair of parallel walls. The column is particularly suited for a cooling tower which includes at least four verticularly extending columns. A horizontal beam extends between each pair of adjacent columns, and the ends of each beam are inserted between the parallel flanges of the columns. A side panel is supported by each beam, and a cover is supported by the side panels and the columns.
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 March 9, 1990 and granted June 16, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 2012.
- 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.