Photographic processing tray producing uniform flow pattern
CA 1111302 A · Owner: Needleman, Samuel · Inventors: Needleman, Samuel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photographic developing tray is described having such configuration as to provide, when placed at an angular position, a trough adapted to contain a certain amount of processing solution. The inner wall of the trough so, formed, has a predetermined slope whereby upon gradually, moving the tray into a horizontal position the solution, contained in the trough cascades over the sloping surface onto a photographic sheet material placed on the bottom of the tray at a substantially uniform flow pattern.
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 October 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 1998.
- 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.