Patent Yard Sign in
Expired Canadian patentCanada

Photographic apparatus for processing large format, self-developing film unit

CA 1062525 A · Owner: Polaroid Corporation · Inventors: Cutler, Norman W. (Jr.); Sorli, Duncan C.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

A processor for extracting a large format selfdeveloping film unit from a cassette, applying a compressive pressure along the length of the film unit to distribute a fluid processing composition between predetermined layers of the film unit, and providing a substantially light-free environment for the film unit for imbibition. The processor features an imbibition dark chamber formed by first and second dark chamber sections. The first section is in the processor housing and the second section pivots between an extended position where it forms an extension of the first section and a storage position wherein it is located in a recess in the processor housing in overlying relation to the first …

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 September 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 18, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedSeptember 18, 1979
Term endedSeptember 18, 1996
Patent numberCA 1062525 A
Classification (IPC)G03D9/02

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedSep 18, 1979Term endedSep 18, 1996

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.