Infrared absorption spectra recording, high pressure sample holder
CA 2005622 A1 · Owner: Wong, Patrick T.T. · Inventors: Wong, Patrick T.T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Patrick T.T. Wong ABSTRACT OF THE DISCLOSURE, An infrared absorption spectra recording high pressure, sample holder comprises a gasket for high compression between two diamond anvils, and an infrared light beam transmitting material partially filling a light passage through the gasket at a position between the two anvils to leave an infrared light beam transmitting sample cavity, adjacent one anvil. The surface of the filling is shaped e.g. dished so that an infrared light beam passing through the sample will have light paths of different lengths thereby avoiding optical interference fringes.
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 December 15, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 15, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 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.