Process for producing an optical device
CA 2434709 A1 · Owner: Nakamura, Koichiro · Inventors: Yamamoto, Hiroaki; Shikata, Hiroko; Nakamura, Koichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical element produced through bonding with an adhesive composition which gives an adhesive layer developing no cracks can be easily prepared, and has , excellent bonding strength. Also provided is a process for producing the optical element which comprises: disposing an adhesive composition obtained by subjecting to hydrolysis and dehydrating condensation a raw solution containing 10 to 50 mol% silane compound represented by SiX14 (X1 represents a hydrolyzable group) or combination thereof with a metal alkoxide 25 to 65 , mol% silane compound represented by PhSiX23 (Ph represents phenyl or substituted phenyl and X2 represents a hydrolyzable group) and 25 to 65 mol% , silane …
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 October 21, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 21, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2024.
- 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.