Solid surface cleaning apparatus and method using a short impulse laser beam for used on the surface to be cleaned
CA 2025463 C · Owner: Boquillon, Jean-Pierre · Inventors: Boquillon, Jean-Pierre; Bresson, Philippe; Berger, Hubert
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 method for cleaning the surface of materials such as particularly stone glass, steel, ceramics, wood, paper or cardboard of the type implementing a laser beam (9) which is focused to the surface to be cleaned characterized in that the ''peak power'' of the laser used to this effect is adjusted to a value comprised between a few hundred of kilowatts and a few tens of megawatts the diameter of the laser beam (9) on the surface to be cleaned being selected so as to obtain on this surface a ''peak power'' density comprised between a few tenths of megawatts per cm<2> and a few tens of megawatts per cm<2>. The field of the invention is particularly restauration …
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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 January 17, 1990 and granted March 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 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.