Procedure and means for measuring paper formation
CA 2001908 A1 · Owner: Ritala, Risto · Inventors: Ritala, Risto; Laakso, Mikko; Koponen, Jari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A procedure for measuring the formation of paper, wherein through a paper sample is passed radiation and the radiation that has passed through the paper is observed with a .beta. radiation detector for establishing a spectrum characterizing the formation of the sample for radiation source being used a liner .beta. radiation source, and the .beta. radiation that has passed through the sample being observed in one dimension with a positionsensitive wire chamber detector operating in LSM mode.
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 October 31, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 31, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2011.
- 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.