Hologram recording medium
CA 1269876 C · Owner: Shimizu, Hidetoshi · Inventors: Kojima, Chiaki; Shimizu, Hidetoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed herein a hologram recording medium comprising of substrate formed of transparent and nonlight scattering material having a plurality of open pores for said substrate and photopolymerization composition impregnated in said open pores. The photopolymerization composition consists essentially of a photopolymerizable monomer or oligomer which adheres to the surface of said open pores, a photopolymerization initiator and activator for controlling the photopolymerization speed.
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 June 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
- 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.