Means for securing a cover over a drainage channel
CA 2111132 A1 · Owner: Sauerwein, Heinrich · Inventors: Arm, Wolfgang; Witt, Jan; Sauerwein, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A means for securing a cover to a drainage channel body defining a drainage channel and wherein said channel body defines at least two cutouts located substantially opposite one another in inner side walls defining said channel comprises at least one cross-bar and a fixing means. The cross-bar defines two ends that can be inserted respectively into said cutouts so that the cross-bar is disposed transversely across the drainage channel. A clamping means is located at at least one of the ends of the cross-bar to retain the cross-bar in place after insertion of its ends into the cut-outs. The fixing means attaches the cover to the channel body by way of attachment of the cover to the cross-bar.
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 December 10, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2015.
- 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.