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Expired Canadian patentCanada

Self-aligning spring clamp

CA 1315957 C · Owner: Wittek Industries, Inc. · Inventors: Spaulding, George E.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A circular spring clamp comprises a spring steel band having a reentrantly folded latch hook at one end and a radially outwardly extending latch at the opposite end with a concave latching surface thereon. The band has radially outwardly extending flanges on opposite edges thereof for guidance and retention of the latch hook.

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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 April 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 13, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 9, 1989
GrantedApril 13, 1993
Term endedApril 13, 2010
Patent numberCA 1315957 C
Classification (IPC)F16L33/02 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedFeb 9, 1989Patent grantedApril 13, 1993Term endedApril 13, 2010

Sources & verification

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