Method and apparatus for contending for access to a communication channel
CA 2085303 A1 · Owner: Scop, Shlomo · Inventors: Scop, Shlomo; Katar, Shmuel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and Apparatus for Contending for Access to a Communication Channel, Abstract of the Disclosure A method of contending for access to a communication channel is described as well as communications apparatus for communication on the channel, such as supervisory control and data acquisition (SCADA) apparatus. Contention is regulated by time delays before requesting access to the channel. When a unit (16) contends successfully, a longer time delay (28) is introduced before the next contention and when it contends unsuccessfully, a shorter time delay is introduced.
Read the whole patent
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 December 11, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2014.
- 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.