Air handling system
CA 1317503 C · Owner: Ball, Norman · Inventors: Ball, Norman; Ramakrishanan, Ramani
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A branch take-off airflow device for use in an air distribution system that includes coaxial input and output ducts and one or more branch ducts includes a status pressure regain section and a take-off section that has a central passageway and one or more take-off passageways. Each of the take-off passageways is generally rectangular in transverse cross-section and defined by inner and outer walls with the latter being a continuation of a wall defining the output opening of the regain section. The inner wall has a thick, rounded leading edge where the take-off passageway commences. In one preferred version, there is an elongate air flow defining member located centrally in the main …
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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
- Granted May 11, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 11, 2010.
- 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.