Polishing machine for spectacle lenses
CA 2268056 A1 · Owner: Wernicke & Co. Gmbh · Inventors: Gottschald, Lutz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention pertains to a polishing machine for spectacle lenses comprising a driven polishing disk, a driven lens holding shaft which can be tilted straight upward and downward and rotates about an axis at a distance from and perpendicular to the rotation axis of both the polishing disk and the lens holding shaft, as well as a polishing casing enclosing the polishing disk and the lens holding shaft and designed so as to be impervious to the liquid coolant squirting from the disk.
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 14, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 2019.
- 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.