Method for coating anti-reflection film on surface of optional material
CA 1045474 A · Owner: Hoya Lens Co. · Inventors: Onoki, Fumio; Kamiya, Hajime
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for coating on the surface of transparent optical, material of glass or synthetic resin silicon oxide (SiO) and, silicon dioxide (SiO2) whose refractive indices are varied by changing the condition of vapor-deposition under a predetermined, condition of vapor-deposition so as to form a firm and durable anti-reflection film.
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
- Granted January 2, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 1996.
- 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.