Two-wire bus instrument
CA 2539202 C · Owner: Micro Motion, Inc. · Inventors: Mansfield, William M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An intrinsically safe two-wire bus instrument such as a flowmeter for hazardous environments and, adapted for use with a two-wire bus. An instrument element receives a third current and generates, one or more sensor measurement signals. A signal processor receives a second current and, processes the one or more sensor measurement signals to produce a data signal. A communication, system receives a first current receives the data signal, generates a digital communication signal, including the data signal and modulates the digital communication signal onto the two-wire bus. The first, second and third currents are respectively provided by a communication power supply, a, signal …
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 September 30, 2003 and granted November 20, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2025.
- 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.