Laser cutting apparatus
CA 2172530 A1 · Owner: Lawson, William E. · Inventors: Lawson, William E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (10) for cutting a material (40) having a thickness T, defined by the distance between a first surface (46) and a second surface (42) of the material (40). The apparatus (10) comprises an energy source (12) for providing a beam of energy (14) and directing, mirrors for directing the beam of energy from the energy source to a first focal point (80) between the first and second surfaces (46 42) of, the material, and to a second focal point (98) between the first and second surfaces (46 42) of the material (40). The first and second focal points (80, 98) are spaced apart from each other by a distance sufficient to cut through the entire thickness of the material (40).
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 15, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 15, 2016.
- 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.