Means of causing a plane mirror to function as a heliostat of adjustable focal length
CA 2237882 A1 · Owner: Symington, P. Tracy · Inventors: Symington, D. Fraser; Symington, A. Fraser; Symington, P. Tracy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of systematically deforming a plane mirror to function as a focusing heliostat of, adjustable focal length. A plane mirror is made to deform through the application of force at a, number of peripheral points which is opposed by the application of force to the centre area of the, mirror. The resulting complex topology functions as a solar mirror capable of concentrating, incident sunlight on a distant focal point. By adjusting the degree and location of the forces, applied to the mirror the focal length and degree of concentration of sunlight on the focal point, can be adjusted.
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 2, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 2020.
- 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.