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Expired Canadian patentCanada

Automatic centrifugal balancing mechanism

CA 1259974 A · Owner: Abbott Laboratories · Inventors: Holen, James T.

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

Apparatus for generating centrifugal forces preferably used in carrying out chemical testing which, includes counterweight means on a rotating member of the apparatus which are displaced in response to centrifugal force when no article to be subjected to centrifugal force is used with the apparatus, thereby to automatically balance the rotating member.

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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 12, 1986
GrantedSeptember 26, 1989
Term endedSeptember 26, 2006
Patent numberCA 1259974 A
Classification (IPC)B04B5/02 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedMarch 12, 1986Patent grantedSep 26, 1989Term endedSep 26, 2006

Sources & verification

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