Extendible prop for construction sites
CA 2024739 A1 · Owner: Lubinski, Ronald · Inventors: Lubinski, Ronald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A prop for use in reshoring concrete floors and other high-load applications is extendible in length from 10 to 14 feet in its preferred form. The prop includes an upper tubular member and an upper abutment plate welded to an upper end thereof. A lower tubular member is loosely received within the upper tubular member and has a lower abutment plate welded to an lower end thereof. An external screw thread extends along the lower tubular member a distance corresponding to the range of extension of the prop. A wing-nut assembly has an internal screw thread meshed with the external screw thread of the lower tubular member and is configured to support the upper tubular member. The wing-nut …
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 September 6, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2012.
- 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.