D-shape laser beam projector
CA 2193134 C · Owner: Powell, Ian · Inventors: Powell, Ian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical lens is useful as a D-shape laser beam projector. The lens consists of a known linear diverging element enabling the expansion of a laser beam into an uniform line, and a matching section of an axicon either, a symmetrical half-axicon or a non-symmetrical one cut in, a plane passing through, or nearly through its apex. The, two components, joined together in a plane of cutting of the axicon section, are positioned in a laser beam such that the beam is incident on both apices of the linear diverging element and the axicon section.
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 December 13, 1996 and granted August 27, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2018.
- 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.