Lens-fitted photographic film package
CA 2242143 C · Owner: Matsushita Electric Industrial Co. Ltd. · Inventors: Mototani, Yuji; Hoshina, Yasuko; Wada, Seiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a lens-fitted photographic film package, which prevents a photographic film set in the sealed and wrapped film package from being deteriorated by gaseous hydrogen leaked from a battery and ascertains the more excellent stroboscopic properties than those of a conventional LR6 alkaline dry battery. The lens-fitted photographic film package comprises an unexposed photographic film, a shooting mechanism a, stroboscope, and a power-source battery that supplies electric power to the stroboscope, wherein the battery is an alkaline battery prepared by adding nickel oxyhydroxide to a cathode mixture mainly composed of manganese dioxide and a conductive material.
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 August 10, 1998 and granted August 6, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2020.
- 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.