Preserving state in stateless network protocols
CA 2206685 C · Owner: International Business Machines Corporation · Inventors: Iyengar, Arun K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system for preserving state in computers communicating over networks such, as the World Wide Web (WWW) using stateless protocols e.g. HTTP. State is preserved in a, conversation between a client requesting services from a served by performing the service and identifying all continuations (hyperlinks) in an output from the service; recursively embedding the state information in all identified continuations in the output sent to the client. The state information may be embedded and communicated by the server to the client. Alternatively dynamically, downloadable program code may be used to embed the the state information at the client. Additional features enable the filtering …
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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 June 2, 1997 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 2, 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.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.