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Expired Canadian patentCanada

Method of synchronizing the sequence by which a variety of randomly called unrelated activities are executed in a digital processor

CA 1214566 A · Owner: Burroughs Corporation · Inventors: Green, Howard H.; Tomlinson, Christopher J.

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

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Abstract From the Canadian patent

A method of synchronizing the sequence by which a variety of unrelated activities are executed in a digital processor when the activities are randomly called by multiple callers includes the steps of: providing a single processor queue for holding respective pointers to each different kind of activity that the processor performs; entering the pointer of an activity in the processor queue the first time that the activity is called; providing respective activity queues for each different kind of activity that the processor performs; entering a pointer to the caller of an activity in the respective queue for the called activity each time the activity is called subsequent to its first call; …

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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 November 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 20, 1984
GrantedNovember 25, 1986
Term endedNovember 25, 2003
Patent numberCA 1214566 A
Classification (IPC)G06F9/40 +2 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedJuly 20, 1984Patent grantedNov 25, 1986Term endedNov 25, 2003

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