Circuit pack cooling using perforations
CA 2041461 C · Owner: American Telephone And Telegraph Company · Inventors: Azar, Kaveh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an apparatus for providing forced air cooling of components mounted on circuit boards in a stacked configuration. A plurality of perforations is provided in the circuit boards so that air flow in the channel between boards causes air to be sucked through the perforations to eliminate stagnant areas between components and provide local jet impingement cooling.
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 April 29, 1991 and granted May 20, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 2013.
- 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.