Method for the polymerization rotation casting of lenses and equipment for performing this method
CA 1330855 C · Owner: Krcova, Zuzana · Inventors: Krcova, Zuzana; Sulc, Jiri
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the polymerization rotation casting of lenses containing a convex and concave surface in molds being placed in a rotation mechanism, where the convex surface of the lens is formed by the rotation of a liquid having a higher specific weight than that of monomer mixture and is immiscible with the monomer mixture and also with its individual components. The concave surface of the lens is formed by a convex surface of the mold while the remaining space of the mold is filled with the liquid having a higher specific weight. The method for the rotation casting may be carried out both in a column arrangement of molds and in single separate mold. And an equipment for carrying out this …
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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
- Granted July 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 26, 2011.
- 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.