An optical connection
CA 2245850 A1 · Owner: Heitmann, Walter · Inventors: Heitmann, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The optical connection here described, between fibre optic waveguides and an optical window in particular for, measurement purposes ensures improved long-term stability and improved measurement precision because of the extreme stability of transmissions. The surface of the optical window is coated with a thin, absorption-free layer of extremely hard material, with the result that its scratch resistance is greatly increased and thus measurement precision is similarly enhanced by the elimination of scratches. The thickness of the protective layer is such that troublesome reflection losses caused by differences in the refractive indexes have largely been eliminated. The hardness of the …
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 August 27, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 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.