Narrow-band laser apparatus
CA 2032054 C · Owner: Furuya, Nobuaki · Inventors: Horiuchi, Naoya; Yamanaka, Keiichiro; Miyata, Takeo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laser apparatus comprises an optical resonator including first (2) and second mirrors (3) and laser, medium (1). A wavelength selection element (6) is provided in the resonator for narrowing band-width. A polarizing conversion element (4) for changing ratio of S to P components and polarizing beam splitter (5) are provided for amplifying laser beam to output after wavelength selection and for reducing light load of the wavelength selection element (6). The polarizing conversion element (4) is provided in the resonator light path. In another embodiment, the polarizing conversion element (4) is provided in a branch light path formed by a second polarizing conversion element and a third …
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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 December 12, 1990 and granted October 4, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.