Fabric structure with double tensioning cables
CA 2048141 A1 · Owner: Stafford, Robert M. · Inventors: Stafford, Robert M.; Stafford, Robert M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rapidly erectable building structure includes a plurality of arches each having a pair of lower ends. Base mechanisms are provided for holding the lower ends of the arches to position them in longitudinally spaced transversely extending, vertical positions. A plurality of panels of a flexible web material are stretched between the arches. Each panel has a pair of opposite side edges a, width corresponding to a longitudinal distance between adjacent ones of the arches and a length corresponding to a transverse distance spanned by the arches. A first pair of lines is connected to a first end portion of each panel and a second pair of lines is connected to an opposite second end portion of …
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 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 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.