Track switch snow melter duct joint clamp
CA 2128365 A1 · Owner: Fox, David K. · Inventors: Fox, David K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A track switch snow melter duct connection system including end flanges with a top portion each end flange, being attached to a distal end portion on a duct which is to be connected such that the top portion extends outward and above the distal end portion. Side flanges are also attached to each duct and extend outward such that a gap exists between the distal end portion of each duct and the side flange. The connection system also includes an attachment mechanism for attaching the top portion of end flanges on adjacent ducts and a connecting member which can be slidably inserted between adjacent ducts having an elongate channel shape formed by a base and two side legs and two extensions …
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 July 19, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 19, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 2016.
- 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.