Microwave scanning apparatus
CA 2046895 C · Owner: Leicester, Robert Hocquard · Inventors: Leicester, Robert Hocquard; Stevens, Thomas James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for testing samples, particularly sawn timber to determine moisture content, density, presence of knots or pith slope of grain and parallelism of fibres using plane polarised microwave , radiation. The apparatus includes means (7-11) to supply the radiation to a sample (1) and means (12-17) to detect radiation transmitted through the sample. The supply and detection means include means (10 and 14) to adjustably rotate the polarisation plane of the supplied and received microwave radiation. The apparatus may comprise one arm of a bridge circuit having another reference arm (5).
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 February 9, 1990 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2012.
- 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.