Fiber-optic interface system
CA 2201894 C · Owner: Bjork, Paul E. · Inventors: Bjork, Paul E.; Cucci, Gerald R.; Stasz, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fiber-optic data-link (10) used to interface a remote process variable sensor/transmitter (14) to a local process control system (12) includes a local light source module (16) and a remote interface module (18) interconnected by one or more optical fibers (20 22). Energy for operating , the remote interface module (18) and its associated process variable sensor/transmitter (14) is provided by light energy transmitted from the local site to the remote site and converted at the remote site to an electrical signal. The local light source module (16) and the remote interface module (18) each may include a microcontroller (24 34). The controllers not only , control the flow of status …
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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 3, 1995 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 3, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 3, 2017.
- 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.