Holder for disposable photographic film packages
CA 2004276 C · Owner: Hoffman, Robert H. Jr. · Inventors: Hoffman, Robert H. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photographic film holder for use with a removable photographic film package has a bottom portion positioned in a spaced relationship with respect to a top portion to form a film package receiving cavity therebetween. The top portion and the bottom portion are movable transversely relative to one another by means of a slide carrier having pins which cooperate with camming surfaces. A film position retention tab is operative when the holder is in the closed position for holding the film in an exposing anchoring position. Said holder being movable to an open position releasing the film position retention tab and opening the package insertion slot to permit withdrawal of the film package from …
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 November 30, 1989 and granted March 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2011.
- 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.