Retractable stadium roof
CA 1330614 C · Owner: Allen, Christopher Michael · Inventors: Robbie, Roderick George; Allen, Christopher Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Inventors: C. Michael Allen Roderick G. Robbie, ABSTRACT OF THE DISCLOSURE A retractable roof for a stadium, comprising a central arch separating a pair of end segments, one end segment being fixed the, other end segment being movable arcuately laterally to a position axially transverse to its closed position and the central arch, being movable to a position above the fixed end segment.
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
- Granted July 12, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 12, 2011.
- 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.