Mehtod of producing lens, method of fabricating article with lens, articles with lens, resin composition for forming defining lines and lens-forming resin composition
CA 2173201 C · Owner: Grapac Japan Co. Inc. · Inventors: Yumoto, Yoshihide
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lens body or article with lens is produced by forming lens-forming defining lines on the surface of a substrate coating a lens-forming resin on the surface to thereby allow the lens-forming resin to swell in a convex form between the lensforming defining lines by means of the repellency of the lensforming resin with the lens-forming defining lines and then, curing the lens-forming resin. To this method is added a step of providing an image on the substrate to obtain an article with lens having the image. The image can stereoscopically be seen through the article with lens obtained by this method.
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 September 30, 1994 and granted May 29, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2016.
- 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.