Light shielding magazine for a film cartridge
CA 2124386 C · Owner: Masuda, Sigeru · Inventors: Masuda, Sigeru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A light shielding magazine includes a pair of holders pivotable relative to each other for receiving a film cartridge. The film cartridge includes a film feed opening and a pivotable light shield provided for the film feed opening to prevent entry of ambient light and to allow passage of a film through the film feed opening. One of the holders defines a cover portion for covering the film feed opening when the light shielding magazine is mounted on the film cartridge,to prevent entry of ambient light to the film feed opening and to allow passage of the film fed out through the film feed opening.
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 May 26, 1994 and granted July 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 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.