Improvements in time domain reflectometry
CA 2286439 A1 · Owner: Siemens Milltronics Process Instruments Inc. · Inventors: Sacuta, Walter; Cherniwchan, Trent; Sherrard, Wayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A time domain reflectometry method for determining positions of upper and lower interfaces of a first liquid floating on a second liquid within a vessel, using a system includes a probe in the form of a transmission line extending vertically within the vessel from a point above a highest level to be measured of the upper interface to below a lowest level to be measured of the lower interface and an, impulse radar system connected to the upper end of the transmission line, the micro impulse radar system including a microwave pulse generator. The method includes the steps of constructing and installing the transmission line so as to have a pulse response substantially free of internal …
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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 15, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2021.
- 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.