Apparatus and method for the detection and measurement of liquid water and ice layers on the surfaces of solid materials
CA 2110188 A1 · Owner: Rim Tech, Inc. · Inventors: Stolarczyk, Larry G.; Stolarczyk, Gerald L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An embodiment of the present invention is a roadway sensor for surface installation in a hole such that a thin ceramic contact sensor may be used to measure and crosscompare fundamental physical antenna parameters of the space immediately above a roadway or bridge surface. Measurements are combined by a microprocessor to discriminate between dry pavement, water (rain) snow and, ice above the sensor head. Ambient surface temperature water depth and ice/slush conditions are determined to estimate any hydroplaning hazard and ice/antifreeze/water mixtures. The sensor comprises an antenna that exhibits a resonant frequency and an input admittance including a real term; a Maxwell bridge coupled …
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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 November 29, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2015.
- 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
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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.