Corrosion-free bridge system
CA 2427152 A1 · Owner: El-Badry, Mamdouh M. · Inventors: El-Badry, Mamdouh M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a system for short- and medium-span bridges. The bridge superstructure is built entirely from materials that are not vulnerable, to corrosion. It consists of precast prestressed concrete truss girders and a concrete deck. The girders have top and bottom concrete bulbs (i.e. flanges) connected by precast veri:ical and diagonal truss members made of corrosion-resistant metallic or non-metallic tubes filled with concrete. The deck can be a, cast-in-situ reinforced concrete slab or an assembly of precast concrete panels, tied together by longitudinal and transverse post-tensioning cables. The reinforcement in the slab is glass FRP in three directions and …
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, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 29, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 2025.
- 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.