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Expired Canadian patentCanada

Film unit deflection system for self developing camera

CA 1087896 A · Owner: Polaroid Corporation · Inventors: Friedman, Harvey S.

CIPO record

Overview

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

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Abstract From the Canadian patent

Abstract of the Disclosure, A self-developing camera utilizes a fixed cam surface and a resilient deflector strip to introduce a local longitudinal bend in a film unit as it proceeds over a relatively short portion of a film processing path from the nip of a pair of processing rollers to an exit slot. The deflector strip is secured near the end of the cam surface adjacent the exit slot with a free edge positioned to intercept the film unit proceeding from the rollers across the cam surface. The strip itself deflects upon engagement with the film unit to exert a spring force that produces in the film unit the local longitudinal bending which enhances distribution of a fluid photoprocessing …

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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 21, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 21, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 15, 1977
GrantedOctober 21, 1980
Term endedOctober 21, 1997
Patent numberCA 1087896 A
Classification (IPC)G03B17/50 +1 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedAug 15, 1977Patent grantedOct 21, 1980Term endedOct 21, 1997

Sources & verification

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