Method and apparatus for molding contact lenses and making their container
CA 2212044 C · Owner: Shannon, John H. · Inventors: Shannon, John H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved, automated method and apparatus for molding contact lenses generally comprises the steps of: (1) forming anterior (20) and posterior (18) mold cavities in longitudinally spaced relation in first and second webs (10 12) of material, respectively; (2) dispensing a liquid, curable, lens material (e.g. monomer) in each anterior cavity of the first web; (3) aligning and bringing the posterior and anterior cavities into sequential mating, centered engagement with each other (4) curing the lens material captured between between respective posterior and anterior molds; and (5) separating the webs to release the lenses (34) cast therebetween. In an advantageous embodiment of the …
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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 January 30, 1996 and granted August 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 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.