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Expired Canadian patentCanada

Telecommunications round-robin message delivery

CA 2217622 C · Owner: Greenspan, Steven Lloyd · Inventors: Greenspan, Steven Lloyd

CIPO record

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

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Abstract From the Canadian patent

An improved messaging system for transmitting message information to a plurality of recipients comprises the steps of: sending a first message including the predetermined message information to a first recipient address of a first recipient on a list of recipients; updating, after the completion of the step of sending the list of, recipients to create an updated recipient list the updating being implemented, independently of the first recipient at the first recipient address; and sending a second message, including the predetermined message information to an address corresponding to a next recipient selected from the updated recipient list. The method can iteratively repeat the steps of …

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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

  • Filed October 8, 1997 and granted March 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 8, 1997
GrantedMarch 5, 2002
Term endedOctober 8, 2017
Patent numberCA 2217622 C
Classification (IPC)H04L51/48

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedOct 8, 1997Patent grantedMarch 5, 2002Term endedOct 8, 2017

Sources & verification

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